I just did 2 tests and they worked. Google voice and my regular number.
I know you know to check the rest but...
Does your phone provider have any SMS filtering?
Do you have any SMS / filtering on your phone even, can you check your block list? Make sure you did not accidentally mare the last text they sent you as spam. I did that once.
Did you reach out to them on social media instead of just opening a ticket?
Good luck.
-Dave
I unblocked all my blocked numbers just in case that was the problem but it Didn’t help. Haven’t tried reaching out on social media yet, but I did finally get an email response to my ticket. Just a generic response that’s says switch to authenticator if the sms issue continues