Search all logins with 2FA/MFA

I don’t believe there is a way to directly filter. There is a post about using the Notes field to manually add a “TOTP” note so that you can search

Also, you can see a list of all Verification Codes in the Bitwarden phone apps.

Finally, there is a Custom Item Labels Feature coming soon according to the Roadmap. You could use this feature to manually add a “TOTP” label that I assume would be searchable.

Are any of the above sufficient for your needs? If not, then I guess you should add a Feature Request.