Migrating from Authy to Bitwarden for 2FA Codes
dannyguo.com
dannyguo.com
Also, the migration here is only for 2FA codes on Bitwarden and later the author migrates to 1Password. I'm pretty sure you could choose to migrate altogether either on 1Password or Bitwarden since they both support 2FA codes.
If it were me, I'd just migrate to using Dashlane instead.