Another update:
After playing for about 5 days and doing random amount of content (lvling/AH/Mythic raiding/dungeon spamming etc) using driver version 20.9.1 with XMP profile off, I haven’t experienced a single WoW crash or error #132. I tried playing with XMP on with above mentioned driver, but sadly still had crashes as reported previously.
Once again it might be worth either checking your RAM via memtest or trying to turn off XMP profile and see if that helps.
Once I get some free time I’ll give a shoot at Driver Version 20.10.1 which specifically mentions support for WoW: Shadowlands pre patch, with XMP off/on.