@Sibro.o,
Removing the 2 folders added by updates kb5007651 and deleting the SecurityHealthSetup.exe, will leave only the stuff installed by Build 25281.
Double click on the first .appx reinstalls the correct version for 25281 and solves the problems.
Edit:
After cleaning up and reinstalling the correct version.
Unfortunately, the update gets downloaded and installed again, and I don't know how to prevent that. 🤷♂️
Firewall & network protection is back:
The update gets reinstalled, and we are back with the bug. 🤬🤬