Since last update, the gnome Document Scanner does not find my scanner.
I have a Brother MFC L2700DW connected via WI-FI and worked with no problems.
It can print, typically by pressing ctrl-P in applications like browser or Libreoffice.
Found this post Scanner programs do not find a scanner but did not help to reinstall sane and sane-airscan.
Also re-build brscan4 brscan-skey and brother-mfc-l2700dw did not help.