sudo btrfs subvolume list /
should show a lot of snapshots !
see my list:
sudo btrfs subvolume list /
ID 258 gen 554281 top level 5 path @home
ID 287 gen 544112 top level 258 path @home/.snapshots
ID 3648 gen 554276 top level 5 path @snapshots
ID 4455 gen 554281 top level 5 path @nosnap
ID 5719 gen 554277 top level 5 path @home.snapshots
ID 36033 gen 554281 top level 5 path @
ID 36219 gen 441242 top level 3648 path @snapshots/18974/snapshot
ID 37135 gen 449216 top level 3648 path @snapshots/19479/snapshot
ID 38075 gen 468937 top level 3648 path @snapshots/20007/snapshot
ID 39046 gen 496793 top level 3648 path @snapshots/20563/snapshot
ID 39328 gen 506898 top level 3648 path @snapshots/20719/snapshot
ID 39329 gen 506901 top level 5719 path @home.snapshots/14302/snapshot
ID 39798 gen 515413 top level 3648 path @snapshots/21053/snapshot
ID 39799 gen 515415 top level 5719 path @home.snapshots/14424/snapshot
ID 40008 gen 524999 top level 3648 path @snapshots/21165/snapshot
ID 40009 gen 525002 top level 5719 path @home.snapshots/14522/snapshot
ID 40225 gen 534118 top level 3648 path @snapshots/21288/snapshot
ID 40226 gen 534121 top level 5719 path @home.snapshots/14616/snapshot
ID 40261 gen 535421 top level 3648 path @snapshots/21306/snapshot
ID 40496 gen 539256 top level 3648 path @snapshots/21431/snapshot
ID 40497 gen 539259 top level 5719 path @home.snapshots/14744/snapshot
ID 40753 gen 545883 top level 3648 path @snapshots/21582/snapshot
ID 40754 gen 545886 top level 5719 path @home.snapshots/14845/snapshot
ID 40956 gen 549551 top level 3648 path @snapshots/21695/snapshot
ID 40957 gen 549553 top level 5719 path @home.snapshots/14934/snapshot
ID 41181 gen 550920 top level 3648 path @snapshots/21819/snapshot
ID 41182 gen 550922 top level 5719 path @home.snapshots/15032/snapshot
ID 41208 gen 551094 top level 3648 path @snapshots/21833/snapshot
ID 41450 gen 552358 top level 3648 path @snapshots/21987/snapshot
ID 41451 gen 552360 top level 5719 path @home.snapshots/15130/snapshot
ID 41479 gen 552554 top level 3648 path @snapshots/22002/snapshot
ID 41480 gen 552556 top level 5719 path @home.snapshots/15144/snapshot
ID 41507 gen 552750 top level 3648 path @snapshots/22017/snapshot
ID 41508 gen 552752 top level 5719 path @home.snapshots/15157/snapshot
ID 41531 gen 552868 top level 3648 path @snapshots/22032/snapshot
ID 41532 gen 552869 top level 3648 path @snapshots/22033/snapshot
ID 41537 gen 552902 top level 3648 path @snapshots/22036/snapshot
ID 41544 gen 552944 top level 3648 path @snapshots/22040/snapshot
ID 41545 gen 552946 top level 3648 path @snapshots/22041/snapshot
ID 41546 gen 552948 top level 3648 path @snapshots/22042/snapshot
ID 41547 gen 552949 top level 3648 path @snapshots/22043/snapshot
ID 41548 gen 552955 top level 3648 path @snapshots/22044/snapshot
ID 41549 gen 552964 top level 3648 path @snapshots/22045/snapshot
ID 41550 gen 552966 top level 5719 path @home.snapshots/15171/snapshot
ID 41563 gen 553056 top level 3648 path @snapshots/22052/snapshot
ID 41576 gen 553148 top level 3648 path @snapshots/22059/snapshot
ID 41577 gen 553151 top level 3648 path @snapshots/22060/snapshot
ID 41578 gen 553152 top level 3648 path @snapshots/22061/snapshot
ID 41579 gen 553156 top level 3648 path @snapshots/22062/snapshot
ID 41580 gen 553158 top level 5719 path @home.snapshots/15184/snapshot
ID 41607 gen 553341 top level 3648 path @snapshots/22076/snapshot
ID 41608 gen 553347 top level 3648 path @snapshots/22077/snapshot
ID 41609 gen 553349 top level 5719 path @home.snapshots/15198/snapshot
ID 41620 gen 553426 top level 3648 path @snapshots/22083/snapshot
ID 41625 gen 553456 top level 3648 path @snapshots/22086/snapshot
ID 41626 gen 553462 top level 3648 path @snapshots/22087/snapshot
ID 41627 gen 553464 top level 5719 path @home.snapshots/15206/snapshot
ID 41650 gen 553624 top level 3648 path @snapshots/22099/snapshot
ID 41655 gen 553647 top level 3648 path @snapshots/22102/snapshot
ID 41656 gen 553650 top level 3648 path @snapshots/22103/snapshot
ID 41657 gen 553652 top level 5719 path @home.snapshots/15220/snapshot
ID 41684 gen 553835 top level 3648 path @snapshots/22117/snapshot
ID 41685 gen 553838 top level 3648 path @snapshots/22118/snapshot
ID 41686 gen 553839 top level 5719 path @home.snapshots/15234/snapshot
ID 41701 gen 553944 top level 3648 path @snapshots/22126/snapshot
ID 41708 gen 553978 top level 3648 path @snapshots/22130/snapshot
ID 41709 gen 553982 top level 3648 path @snapshots/22131/snapshot
ID 41710 gen 553984 top level 3648 path @snapshots/22132/snapshot
ID 41711 gen 553985 top level 3648 path @snapshots/22133/snapshot
ID 41712 gen 553987 top level 3648 path @snapshots/22134/snapshot
ID 41713 gen 553988 top level 3648 path @snapshots/22135/snapshot
ID 41714 gen 553990 top level 3648 path @snapshots/22136/snapshot
ID 41715 gen 553991 top level 3648 path @snapshots/22137/snapshot
ID 41716 gen 553993 top level 3648 path @snapshots/22138/snapshot
ID 41717 gen 553994 top level 3648 path @snapshots/22139/snapshot
ID 41718 gen 554003 top level 3648 path @snapshots/22140/snapshot
ID 41721 gen 554022 top level 3648 path @snapshots/22142/snapshot
ID 41722 gen 554024 top level 5719 path @home.snapshots/15246/snapshot
ID 41723 gen 554036 top level 3648 path @snapshots/22143/snapshot
ID 41724 gen 554038 top level 5719 path @home.snapshots/15247/snapshot
ID 41725 gen 554054 top level 3648 path @snapshots/22144/snapshot
ID 41726 gen 554057 top level 3648 path @snapshots/22145/snapshot
ID 41727 gen 554059 top level 5719 path @home.snapshots/15248/snapshot
ID 41728 gen 554071 top level 3648 path @snapshots/22146/snapshot
ID 41729 gen 554073 top level 5719 path @home.snapshots/15249/snapshot
ID 41730 gen 554084 top level 3648 path @snapshots/22147/snapshot
ID 41731 gen 554086 top level 5719 path @home.snapshots/15250/snapshot
ID 41732 gen 554090 top level 3648 path @snapshots/22148/snapshot
ID 41733 gen 554092 top level 3648 path @snapshots/22149/snapshot
ID 41734 gen 554094 top level 3648 path @snapshots/22150/snapshot
ID 41735 gen 554095 top level 3648 path @snapshots/22151/snapshot
ID 41736 gen 554098 top level 3648 path @snapshots/22152/snapshot
ID 41737 gen 554099 top level 3648 path @snapshots/22153/snapshot
ID 41738 gen 554106 top level 3648 path @snapshots/22154/snapshot
ID 41739 gen 554107 top level 5719 path @home.snapshots/15251/snapshot
ID 41740 gen 554122 top level 3648 path @snapshots/22155/snapshot
ID 41741 gen 554124 top level 3648 path @snapshots/22156/snapshot
ID 41742 gen 554126 top level 5719 path @home.snapshots/15252/snapshot
ID 41743 gen 554134 top level 3648 path @snapshots/22157/snapshot
ID 41744 gen 554136 top level 3648 path @snapshots/22158/snapshot
ID 41745 gen 554142 top level 3648 path @snapshots/22159/snapshot
ID 41746 gen 554143 top level 5719 path @home.snapshots/15253/snapshot
ID 41747 gen 554155 top level 3648 path @snapshots/22160/snapshot
ID 41748 gen 554156 top level 5719 path @home.snapshots/15254/snapshot
ID 41749 gen 554170 top level 3648 path @snapshots/22161/snapshot
ID 41750 gen 554179 top level 3648 path @snapshots/22162/snapshot
ID 41751 gen 554181 top level 5719 path @home.snapshots/15255/snapshot
ID 41752 gen 554193 top level 3648 path @snapshots/22163/snapshot
ID 41753 gen 554195 top level 5719 path @home.snapshots/15256/snapshot
ID 41754 gen 554206 top level 3648 path @snapshots/22164/snapshot
ID 41755 gen 554208 top level 5719 path @home.snapshots/15257/snapshot
ID 41756 gen 554219 top level 3648 path @snapshots/22165/snapshot
ID 41757 gen 554221 top level 5719 path @home.snapshots/15258/snapshot
ID 41758 gen 554232 top level 3648 path @snapshots/22166/snapshot
ID 41759 gen 554234 top level 5719 path @home.snapshots/15259/snapshot
ID 41760 gen 554245 top level 3648 path @snapshots/22167/snapshot
ID 41761 gen 554247 top level 5719 path @home.snapshots/15260/snapshot
ID 41762 gen 554253 top level 3648 path @snapshots/22168/snapshot
ID 41763 gen 554254 top level 3648 path @snapshots/22169/snapshot
ID 41764 gen 554255 top level 3648 path @snapshots/22170/snapshot
ID 41765 gen 554256 top level 3648 path @snapshots/22171/snapshot
ID 41766 gen 554261 top level 3648 path @snapshots/22172/snapshot
ID 41767 gen 554263 top level 5719 path @home.snapshots/15261/snapshot
ID 41768 gen 554275 top level 3648 path @snapshots/22173/snapshot
ID 41769 gen 554277 top level 5719 path @home.snapshots/15262/snapshot
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If they do not show, may be they do not exist.
Are you sure this is the right place(device) to look ?
I do have NO experience with timeshift
because i do use snapper