linux instructions for the A5(2017) https://doc.e.foundation/devices/a5y17lte/install
and
windows instructions for the Tab A7(2020) https://wiki.lineageos.org/devices/gta4lwifi/install/
are good to compare with :
.
you need to choose :
on Linux or Windows computer
using TWRP or recovery-e
via adb sideload or internal storage