Last week I started experimenting with FIDO2 keys (yubikey, passkey etc.) and thought that it would be reall cool if I could login to openwrt panel using FIDO2 key. Openssh supports this natively, so I could configure this for ssh server. However www interface also exists and is very usefull. To my knowledge luci does not support FIDO2 keys. I wish there was package like 'luci-app-fido2' that would allow logging in to luci using FIDO2 keys. I think there could be two variants: a) FIDO2 key as second factor - you enter login and password and later authenticate with key; b) there are no text boxes for login and password just button 'log in using FIDO2' and pressing it would authenticate user.
This feature implemented + some wiki tutorial about the overall state of FIDO2 keys in openwrt.