Intel UHD 620 is getting me mad... (7 MB problem)

Hey folks!
I have a Thinkpad T590 (i7-5865U, UHD 620), I installed a vanilla Mojave (And before also a vanilla Catalina) on it, it works, I mean, I can boot it etc. but... I don't understand how can I make that Video card working.

I'm sure it's possible to use it, somebody in a sort of way did it! But I can't understand what to do. Maybe by injecting another similar card.. I don't know.

Anyway, could someone help me, please?