[xaduha]

> I don't remember where I've used my YubiKey in the past.

I've yet to encounter a site that allows to enroll a FIDO device without setting up some other form of 2FA and for me it's TOTP which are kept in the app.

[girvo]

Yeah I stick to TOTP for the most part which means the YubiCo app has the list. I always enrol two keys though, one back up and one active.