I successfully upgraded my Asus X99-A (Hasswell-E) with a TPM 2.0 module. It is still not compatible with Windows 11. Any ideas why?

Screenshots (in German, sorry):
Device Manager: https://i.imgur.com/cwAO7fD.jpg
Win 11 Update check: https://i.imgur.com/gzzThYq.jpeg

I think Microsoft needs to provide us with more information. I would really like to use W11, however, I am not going to trash my perfectly fine i7-5820k, esp. not during a silicone shortage. I am seriously considering to leave the Windows platform if this is not resolved somehow.

Maybe you guys have more information.