Yes they are available on iOS.

I use alt browsers like DDG and Brave that have builtin ad blocking. I also have a pihole.

Stop spying on us.

Privacy problems are not policy problems, businesses are choosing to invasively collect data in order to pad their coffers. This is not welcome and just because you try to hide this fact in obfuscated policy language it is not ok.

I have used my Yubikey to do FIDO2 auth on Linux Mint with Chromium and Firefox. I have tried M365, Twitter and Facebook but any website that supports FIDO2 should work.

Did not need to install any OS components.