I made an application with opengles which works correctly in armbian xenial 3.4.113, I always have 40 or 50 fps, also if I run the es2gears program it gives me a constant 300 fps, I wanted to change to a more current kernel and download armbian buster, but here my program runs at 5 or 6 fps, and es2gears does not exceed 30 fps.
I was reading the posts on the subject in the forums and I found that installing the lima driver activated 3d acceleration, but I could not make it work.
Some information that can help me activate 3d acceleration with kernel 5.8 I am using an orange pi one

  thanks: D

Hi.
This is probably what you need. https://linux-sunxi.org/Mali
https://wiki.debian.org/MaliGraphics
Also see here for more info.

Let us know if it performs well. I haven't tried on Mali400. I don't think it will perform better than 3.4.