I've recruited for many roles in the UK for a very large tech employer (1000s of developers but not a FAANG).
With 20 years experience you'd get through our semi-automated processes and
get an interview if the skill sets and employment history matched - regardless of a university level experience.
Are you sure it's the degree that's holding you back?
I'm not advising you lie, as it's fraud, but just adding that over here it would be incredibly rare to ask for proof of academic qualifications from 20 years ago when recruiting such an experienced hire.
I myself have around 20 years experience, I have a degree but god knows where the certificate is and additionally the university who issued it no longer exists.
Although my degree is adjacent somewhat it is not in CS. I've never been asked to show it to anyone, never asked a hire for theirs either.