I could not use my Google Voice number (that I've had since Grand Central) for most companies that only do SMS 2FA until it became my Google Fi number. Then I guess some flag got set in the database they check against.

Chase bank used to not work with Google voice. I would have to use email for code. Sometime in last year? it started working.

yeah, I use GV with all sorts of things that don't normally allow most likely as a result of being grandfathered in - i.e., I suspect they don't recheck old active numbers as being invalid per VOIP classifications/etc.

GV still works on BOA to an extent: general balance queries through their app or the web will go through but anything involving identity and real transactions via wire or zelle will ask for your real mobile number. Even if you do happen to visit one of their branches they will ask for confirmation through your real mobile number (landlines will obviously not work).

I think your experience is typical. I use my Google Voice number for everything and have rarely had any issues.

There are a few popular companies that blacklist VoIP numbers, but most don't. Even Chase, which historically blocked Google Voice, started allowing it a couple years ago.

Mine has worked as well but it used to be a landline when I first acquired it many moons ago.

Execs at those companies probably think "Google = good".