Yes, not the way forward IMO. Passkeys are just private keys that sign challenges from within the secure enclave on your iOS device, or from keychain, a TPM, Yubikey, even cross-platform third-party password managers. And with specific protocol scaffolding around them (WebAuthn/FIDO2).

Often when people say they’re doing something with passkeys for nostr it’s not actual passkey passkeys (not WebAuthn/FIDO2), it’s more like “passkey-inspired design". Because passkeys themselves are too limited.