Ahh yea I get what you’re saying like not part of his actual name. In military contexts including recruiting they require people to go by their title and name. But it does feel forced when the other person isn’t military.
When I was in high school the Marines set up a pull up bar to see who could do the most and I won (cause I was like 135 lbs and a climber) and SSG Harris hounded me every week for the next year and a half. Even finding me in the cafeteria and sitting with us at lunch. These guys suck.
I think y’all are talking about different things. Some sites (like google) have direct yubikey support where you plug the key into the device and what you’re talking about isn’t an issue
Other sites don’t have direct support, but allow you to use any authenticator app which is what you’re talking about with using the yubico authenticator app/key combination. Plugging it into a yubico authenticator app on any device will show the codes
Unfortunately I don’t have an answer for a way to protect those other accounts. I guess the hope is that if you lose it, it can’t be tied to your accounts, just the websites themselves