The discussion around this isn’t differentiated enough. Germanys foreign Minister has explicitly stated that what was exported, is stuff whose purpose is defensive in nature, e.g. Ground to air missiles. I can’t say if that is true, though there is some corroborating material. Nevertheless arms exports is too general as a category in my opinion.
Totp for login to Bitwarden is in the free tier. Totp codes for other accounts saved in bitwarden are not. There is a separate free totp app by bitwarden though.
Yubikeys have a Totp functionality as far as I remember. You will find more information on their website. (Edit: this should be the needed instructions)
Never tried it but I am guessing, this is the way it should work: it‘s the same as any other TOTP authentication app, just that the string from which the totp is derived, needs to be stored on the yubikey. On Bitwarden you would use their free Totp tier, which should provide you with that string.
Honestly, i would pay the 10$/y to use WebAuthn, support Bitwardens development, and make my own life easier
Ich kann dir nur das aktuelle Interview der Lage der Nation mit Baerbock empfehlen. Es werden die Waffenlieferungen kritisch angesprochen. Ich finde es wichtig, ihre Position zu diesem Thema zu hören, um so die eigene Meinung besser bilden zu können. Hier der Link zur Online Version, falls kein Spotify genutzt wird.