Here for a last update to add some details.
Please excuse me for going into unnecessary detail and making it extra long. I try to explain in a way everyone can understand because I am a noob myself.
In a clean slim Windows installation without Microsoft Store, wether you install latest or slightly older Nvidia driver (511.79), Control panel does indeed get installed. But. It won't open unless all necessary services are running. And what I mean by open, I talk about the very first time. Because it asks that you agree in terms of use etc, before you can actually use the control panel, something that was not happening in the old standard Nvidia drivers because I guess you had accepted those terms of use during driver installation, so control panel was opening directly without asking for anything. Also maybe now it has to do with the fact that it is treated as an app.. I don't know.
Point is, for it to initially open {or for it to be downloaded successfully in Microsoft store without having the download fail midway or not even start, (I tried it in an other clean slim installation of windows that includes Microsoft store)} , it doesn't have to do with wether some specific services are running or not. Windows for some reason wants other services that have nothing to do with it to be set to automatic. Especially the services that if you want to disable through "view local services" is not possible and it says "parameters incorrect" or something and you can only do it through reggedit, ALL of those need to be enabled even if they have nothing to do with the apps or anything. Proof? I went one by one to enable those services until I was able to fully open/install Nvidia control panel. After spending more than an hour enabling services that I thought was the cause, I enabled windows defender (restarted of course).. still would not open. Then, I enabled the last services that could only be enabled through reggedit that had NOTHING to do with Control panel.. Like Bluetooth ones and some.. DevicePicker and Device Flow... Those were the last ones. Then I could finally open/install nvidia control panel. So just to test, make sure whether it was one of those last 3-4 services that I enabled the cause of the problem, I restarted my pc. Uninstalled Nvidia control panel again, and ONLY disabled Windows defender through reggedit which was not one of the last services I enabled. I restarted my pc. Went in microsoft store and tried to install control panel and it was failing. Just like it did before when windows defender was enabled but the last 3-4 services that had nothing to do with it were disabled. After that, I simply enabled defender again, restarted and I could download control panel successfully again. And open it of course.
So. After you have successfully installed and opened Nvidia control panel and accepted terms of use, You don't need any of the services you enabled for it to be downloaded/opened, to run/function flawlessly. It functions perfectly with the bare minimum services needed for Windows to operate. So again I spent more than 30 minutes disabling services.
I understand sometimes people experience different things in their own systems... This was my accurate experience of how things worked.. and just want to leave it here for the record in case someone has an identical experience.
Again, thank you very much.