Hi! It looks like the passkey you’re trying to use was created on a different device, so this Windows PC may not have access to it. Some passkeys are device-bound (saved only on the device where they were created), while others are synced through a passkey manager (for example, Windows/Microsoft or a third-party manager), so whether it “shows up” on another device depends on how it was saved.
When you see the sign-in prompt, select Sign-in options / Other ways to sign in and choose an alternative method (password, code, etc.). After you’re signed in, you can create a new passkey on this Windows device (or set one up using a synced passkey manager so it’s available across your devices).