I know very little about passkeys and would like to make use of this question to ask my own. How does backing the passkeys up work? Can I just keep a backup somewhere like with a password manager database? Can I use it anywhere, even if I want to use it one time on a friend's device, for example? If it's tied to a device, what if I lose it? What other practical advantages and disadvantages are there?
I know these are probably naive and simple questions and I could find the answers myself, but I remeber when I was trying to find similar things out about authenticators. I didn't want to use them until I learned how to make backups, use it on different devices, including those that are not mine etc. It took quite some time (of not that active looking, but still), most easily-found sources tend to not offer alternatives, especially when most people just use Google, Microsoft or Apple. I would very much appreciate some basic guidance from someone who has experience. I could probably ask AI, but honestly, I probably trust a kind internet stranger more.
Thanks, that helps.