sudo apt full upgrade does not equals to
sudo apt upgrade?
Furthermore it might be of interest on how to get GUI-Apps to run with WSL i tried it first with Xming and had to install Xming-Fonts too to get my program to run. Otherwise it runs out of the box.
Some in your chat pointed me to VcXsrv as an alternative to Xming it does not need further installs and runs after some fiddling without problems (the installation for Win10 is somewhat broken for me).
Also i should note that i got me a Debian subsystem that was originally Debian 9. I could upgrade it to Debian 10 without problems with the usual way (edit apt sources and do
sudo apt full upgrade).
It is not a full Debian from start as some components are not needed (Xserver) or wont work (cpu drivers).
Additionally it is possible to get a good open source terminal emulator for WSL (supports also gitbash and so on): Windows Terminal (Preview). It is still in beta but works already quite fine.
Well you mentioned to create tickets on information that might support you. If this is not helpful feel to delete this issue.
I love your streams learning quite a bit here and there. Also love to get some insights of someone further down the road of life!