Thank you,
there is another HW-probe for same computer sub-model where the whole network adapter fails (so one have to use, USB network adapter)
Kernel: 5.8.11-1-MANJARO
[ 7.789848] r8169 0000:08:00.1: can’t disable ASPM; OS doesn’t have ASPM control
[ 7.789964] r8169 0000:08:00.1: unknown chip XID 54b
Yours linked computer detects the 8169 and has newer kernel 5.10.9-201.
Btw. this computer possibly needs Linux to be installed with EFI and GPT partition, not MBR.