FIDO2 and multiple LUKS partitions

Hi, this is actually not an support question about Nitrokey FIDO2 as such. But I need to understand why I am able to use Nitrokey FIDO2 to open TWO encrypted partitions but I cannot use Feitian key to do same?

With Nitrokey FIDO2 I can use systemd-cryptenroll for TWO partitions and everything works. But not with the Feitian.

So my question to NItrokey team is:

How FIDO2 key from you is different from Feitian in that regard? I am happy to use Nitrokey FIDO2 but like to understand reason behind this difference?