2020 MBP no M1 tho. Happened once three mos or so ago, then before that I can never remember it dropping since I got it Aug of 20
Thinking, it's just too infrequent to pin it down. Let the Wireless Diagnostics utility monitor in the background and log it.
Myself (if I had AC), I'd let Apple run a hardware test just to have it documented for the future. I've seen all kinds of funky WiFi issues over the years both hardware and software based but I'm also writing this on a 13yr old MBP.
Anecdotally this evening my WiFi died but got resurrected after booting into Safe mode. Not saying my card isn't on the way out but compatibility wise, am seeing more and more software issues disguising as hardware problems. But no surprise given it's age.