Passkey issue - No available sign-in for....

Just to add, it looks like this is an Android based issue, because the 1Password passkey when using Windows works there, but on Android 15, I get what's seen in the attached screenshot.

I'm having the exact same issue on a Motorola G.  Signing in from another device worked fine last week, but after the recent upgrade of 1Password to integrate into Windows Hello, my phone no longer works:  "No passkeys available" There aren't any applicable passkeys on this device. Try a new device or create a passkey."

Found a solution. Not sure why I had to do this but I did the following....

1. Force stopped the 1Password app.
2. In the 1Password app info, went to "Storage" and selected "Clear Data".
3. Uninstalled the app.
4. Re-installed the "1Password" app from "Google Play".
5. Re-did all the settings for Autofill and Android, set to "1Password".
6. Android settings "Security and privacy" > "More security settings" > "Passwords, passkeys, and autofill". Make sure "1Password" is the preferred service. You can also unselect "Samsung Pass" for good measure.
7. On the Android Chrome browser app set "Autofill Services" to "Autofill using a another service". You may need to restart the browser session to make this active.

After this all the passkeys started working again. Happy days.