Re: Codes sent by text message

I don't do banking on my phone, only on my
desktop PC. So, Authy yanked their desktop client, can't use it anymore
with my bank, so I'm stuck with them sending the 2FA code to my Google
Voice phone number which forwards to me via e-mail.

WinAuth v3.5 works just as well as Authy and uses the same credentials for TOTP account registrations. It also has an easy to use recovery feature.
https://winauth.github.io/winauth/download.html

There are other TOTP desktop clients, but I don't know which will work
with my bank.

TOTP desktop client credentials are interchangeable as long as you start with each account's secret key or QR code, which I'm sure you have saved.