You need root and chroot in order to play Unity games without this crash... Box64Droid.
After tests and verifications with @luisgamingtest and @CangKia i have concluded almost certainly that in order to play most unity games without crashing with this unity error you need root for your phone and chroot for Box64Droid. As you can see here this is a unity game that crashes for me with proot (the crash is random) and it doesn't crash for @CangKia who has chroot in this video https://youtu.be/aPefqd59jag
Other crashes may still occur to games even in chroot, but this crash with the banner seems to be related to proot...
I'm going to verify this even more with @luisgamingtest and @CangKia but have that in mind for now.
Thanks to @luisgamingtest @CangKia and @zeljkostojanov2353 for helping me test this theory
And @Ilya114UA @smartphonedesktop4229 @ptitSeb123 for Box64Droid
Update: If you run the game with the argument -force-gfx-direct the crash is fixed in a lot of games in proot. Try it out. Other crashes may still occur.