If you have Yubikey, then this is fine https://xeiaso.net/blog/yubikey-ssh-key-storage. I have Google Titan NFC which is basically Feitian K9 NFC, so it doesn't support -O resident.

Back in 2016 I was using https://github.com/philipWendland/IsoApplet which uses https://en.wikipedia.org/wiki/PKCS_11 standard, but modern way is much smoother as long as your OpenSSH server is up to date.