Samsung S25 passkey not recognised?

I have a passkey on my Samsung S25, generated by Samsung. When I come to log in to S3D and select login using a passkey, the login screen recognises the existance of the passkey, and sends a confirmation to my phone. On my phone, I click the “Connect Devices” button, only to be told that there are no passkeys available.

Online help suggests this might be due to Shapr3D not using the same type of passkey which Samsung generated. Is this possible? And if so, how do I generate a passkey whoich Shapr3d recognises?