Restarting the container is how it updates. I just updated the other day to 1.3.0. Ich makes his containers to update on restart. try settin validation to true and restart.
Can you set appdata as an external share & map it as a network share? Thats what i do on my primary win based pc. still need credentials for access but it allows me direct file access & makes my life easier.
Out of curiosity why are you using both 27015 & 27020? Both ports share the purpose of having the server show up in steams list of servers. It's like calling your own phone number, you get a busy signal.
On all Ich's game server containers, if you restart the container the game will update. Ive run his 7 days to die, valheim & V-Rising containers, multiples at one time in fact & never had an issue updating. What unraid version are you on?
You have a lot of typed words but none of which say what your issue is. If you are having trouble getting the 7 Days container to work you can follow my guide here:
https://7dac.net/a-guide-on-how-to-install-ich777s-container-docker-on-an-unraid-server/
This should auto install 20.7 on a fresh install or upgrade on a container restart. i suggest deleting the container & related files and start fresh. Here is a guide i wrote https://7dac.net/a-guide-on-how-to-install-ich777s-container-docker-on-an-unraid-server/
If your server is existing, join my discord for help & give yourself the unraid role & server owner role.