How to set up Nitrokey 3 with KeepassXC on (K)Ubuntu

Nitrokeys FIDO2 / Nitrokey 3
3

In certain circumstances my Nitrokey is recognized by KeepPassXC on Manjaro Linux, details of the problem can be found in an other topic. The whole thing is not stable yet. On two devices with Manjaro Linux I have the same behavior as in the linked topic. So I want to test my luck on a Kubuntu system to understand what the problem is with Manjaro/Arch.