Passkeys not available on this device or browser

I have read the article. Never have I been asked on a supported website if I would like to make passkey. On the Github website I can find in the account settings that I could add a passkey. When I want to setup one I get a similar error as on the PayPal site: "Passkeys not available on this device or browser". It does not make any difference whether I do this on my Mac or on my iPhone.

On my iPhone I was able to make a PayPal passkey in the PayPal app (!). About where this passkey is stored, I am completely in the dark. At least, I can't find it in 1Password. So, when I login to PayPal on my Mac (on any browser) I can only do this with the traditional way: user name, password, and TFA code. The same when I use Safari on my iPhone. No passkey login is offered.

I wonder if you didn't release this passkey option too early. Not are there but a very few websites that support it, but it is very difficult stuff (for me, at least) and it's only getting to work with big limitations. Only with iOS? Not on a Mac (with whatever browser)? Maybe it works with Windows (which I don't have)? I have all of the last versions; the browser extension got uopdated today to 2.16, but that doesn't make any difference.

Although still eager to hear your reaction, for now I stick to the traditional use of logins until it gets easier and more common. I don't want to torture myself (-: