How to force install an addon in Microsoft Edge with Windows 11 Professional

Hello everyone,

Situation:
I have a Windows 11 Professional Notebook with different accounts and one not admin account should be made child safe.
For Firefox I have forced installed some addons that made Firefox chield safe and enforced them with group policies.
Because it is impossible to deinstall Microsoft Edge, I have deleted the files, but after a windows update they where back, I have removed the user rights for Microsoft Edge but after a Windows Update they were back.
Now I have a safe Browser (Firefox) and an unsafe Browser (Edge) on the system and a chield with computer knowledge (and children today have these knowledge) is using Edge when I'm not looking...
I had a remote session with a support member from Miscrosoft for 1,5 hours, us both was clear that Edge cannot be removed, but he tried its best but gave up.
So I changed my approach and installed an addon to make also Edge safe. But there I cannot force the addon by the group policies... So the addon can easily removed... not good for an addon that should make the browser safe :/
I have researched in the internet and found out that it could be done previously with the group policies where you can enter the PFN (package family name) in one of the administrative template, but now it is no longer possible, it is legacy.

Question:
How can I force install an anddon to Microsoft Edge with Windows 11 professional?
(Or remove Microsoft Edge permanently would be ok, too. But this is not possible as far as I know.)

Thank you,
Tiger