1Password Passkeys not usable in Chromium-based browsers

I’m running into an issue with 1Password Browser Extension and passkeys on Linux and MacOs. 
Its just not useable anymore. 

The option “Save and sign in with passkeys” is greyed out.
1Password never appears in passkey login flows.

I have the issue on MacOS and Linux with Vivaldi and Chrome.
Different machines and different browser but chrome based.
With Firefox it works.

What I’ve already tried

• Reinstalling the extension
• Reconnecting the desktop app
• Used nigthly builds
• Installed older chrome versions

No change.

Can someone help please.

Thanks!