I realized long time ago that I don't want my 2FA be tied to my phone number. And then i found you can't export your data from Authy because they know they are scummy fucks and don't want to anyone to leave
You can, though. But not through their app. Someone reverse engineered their protocol and wrote a program that connects like a new client, which you then approve, and it dumps all your random seeds into a text file. I then put them all into Keepass.
People keep acting like Authy is betraying them by not having an export feature, but why exactly are you leaving Authy to begin with? Because they are a security risk?
You're gonna leave Authy a copy of your seeds? That defeats the purpose.
Re-key your MFA codes on the way out. Security isn't necessarily convenient.
I can't even begin to stress what a terrible idea that is. You absolutely don't want to make bulk-rekeying possible unless you like getting all of your accounts compromised at once.
On Android, I replaced Authy with the open-source Aegis app. It's just as functional, allows exporting, and doesn't tie your data to your phone number (nor store it on a central system--not sure if Authy does this or not).
then i found you can't export your data from Authy
Exporting data from a 2FA app sounds like the opposite of secure. Not to mention you don't want your 2FA codes on Authy (or any other 2FA app) to remain valid if you're not using it.
When I switched from Google Authenticator to Authy years ago, I went through each 2FA-enabled account one by one to disable 2FA and then re-enable it using Authy. It's a long process depending on how many accounts you have 2FA enabled on, but it's worth it.
Reading the OP, looks like it's time to generate new keys for all my 2FA accounts.