https://retropie.org.uk/docs/First-Installation/
Using 32 GB Sd Card to flash fresh OS Image -> retropie-buster-4.8-rpi2_3_zero2w.img 2022-03-13.
Used Raspberry Pi Imager and it is awesome.
Click on settings and here we can pre-set up Hostname -> buster48
ssh logind ID -> pi password -> ??? , Keyboard to US, etc .Amazing.
So much easier. I did not bother with wifi. NIC is OK for now.
https://retropie.org.uk/docs/Updating-RetroPie/
From ssh
sudo ~/RetroPie-Setup/retropie_setup.sh
Update: This will update the RetroPie-Setup script and all installed packages.
Wait an hour at least no JOKE, this thing is updating all emus, etc. which is good, just be prepared to wait.....
Updated as of 2022-11-11.