I think they allow importing from Authy but only on rooted phones. I missed the train to move away from Authy in 2024 and now the only non-root option is to regenerate the seed from every provider one by one. As other commenters said, rooting my main phone would lock me out of banking apps. I suppose I could find an old phone, sync from authy cloud, root it, and then migrate, but then generating new seeds is probably both safer and faster at that point.

You can extract keys out of Authy using mitm-proxy. I have done it and switched to Bitwarden.

Importing is usually not an issue, as you can always enter the secret manually. It is the exporting that is the problem.

The secret looks something like this:

JBSW Y3DPF QQHO ....

(usually fairly short unless its google)