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If you are looking to do something similar with a Yubikey check out https://github.com/drduh/YubiKey-Guide for getting started.
It is by far the most comprehensive guide on using a YubiKey as a SmartCard for storing GPG keys. I used this a few years ago and it helped clear up any confusion I had about getting the most out of my Yubikey 5 NFC.
I think people should seriously consider using something like passphrase2pgp [0] in addition to a hardware key like this. That way you can have a brain key (hopefully generated with diceware or equivalent) to tie together day-to-day keys like this to a more permanent identity. I'm honestly surprised that strategy is not more widespread.
[0] https://github.com/skeeto/passphrase2pgp