In Chrome 114.0.5735.199 on Windows 10 Pro, there is no "security key settings pane". The closest thing available is "Privacy and Security -> Security -> Manage phones (control which phones you use as security keys.)"
However, in terms of resident credentials, I thank the GP and I stand corrected, because Yubico's own specs say that this key sports 25 slots. I wonder how many are currently in use, and which version of the CTAP protocol it is using...