I had the issue of a new WD19TBS doc not connecting to my 9570.  I had never used the Thunderbolt function on the computer for any more than power.  In an attempt to fix I tried the update Thunderbolt drivers (without deleting the old drivers) and it would fail every time.

After searching for methods of resolving this issue, I stumbled upon a solution that fixed my issue quickly and without having to delete files and reinstall drivers.

1. Ensure you have latest update files installed from the Dell update site.
2. Plug computer into dock.
3. Type "Thunderbolt" into the search bar on Windows 11.
4. Open Thunderbolt Control Center.
5. You should see the dock listed and at the bottom says "Disconnected".
6. Click the word "Disconnected"
7. Set dock to "Always Connect"
8. Confirm dock now  shows "Connected"
9. Job done.

This immediately fixed this issue of my computer not connecting to the dock.  All ports immediately showed up in Device Manager, ethernet port began communicating and a quick test with a USB drive confirmed dock is communicating.

I hope this helps anyone who is having the same troubles/frustrations.