after many days of trying…
my solution:
- delete all data from “Google play services storage” in your smartphone
- in the HA Companion app, go to Settings > Companion app > Troubleshooting, then select Sync Thread credentials.
- in Nuki app, activate Matter
now it works for me
Problem is that: Update home-assistant network Thread credentials not possible · Issue #4146 · home-assistant/android · GitHub