Hardware Requirements
Minimum
- 64-bit quad core CPU with SSE2 support
- 8 GB RAM
- Full HD display
- Mouse, trackpad or pen+tablet
- Graphics card with 2 GB RAM, OpenGL 4.3
- Less than 10 year old
I think this (you have OpenGL 3.2 and you need 4.3) is your problem, from what I can tell on this site (https://mesamatrix.net), virgl (just v-i-r-g-l) is a project from mesa.
This line under OpenGL is what you want, I think.
virgl (96.2%) 154 4.3
Although I think its more likely that a solution can be found by upgrading debian to bullseye, because IIRC the glibc version is important to get the opengl version to work.
I think I would recommend taking this up with the debian folks.
I run opensuse and I had to upgrade to a more programmer friendly version to get I think it was 2.8 to work at all with my nvidia graphics card.