A: Ignore that. SamFW uses a different ADB trick. If it fails, unplug, restart the tablet, and try the "Help & feedback" shortcut again. If this worked for you, hit "Thanks" below. If you are stuck, post your Baseband version (Settings -> About tablet -> Software info) and I will help.
[SOLVED] How to Unlock FRP on SAMSUNG Galaxy Tab A8 10.5 (SM-X200 / SM-X205) – Android 13/14 Unlock FRP on SAMSUNG Galaxy Tab A8 10.5 -2021-
Flash the stock firmware using Odin (download from Frija/SamFirm). That often restores ability to use the keyboard exploit. A: Ignore that