Software Freedom Conservancy has a pretty nice page called Give Up GitHub!, definitely check that out

If you use a Google Pixel Tablet, you can install GrapheneOS and revoke Sensor permissions for all apps.

Why C418 - Cat ?

I generally like Louis Rossmann, but his arguments in the GrapheneOS video were beyond stupid. He says that he can’t trust GrapheneOS because it’s developed by Daniel Micay. I guess he doesn’t understand that GrapheneOS is open source and anyone can see the code. Then he switched back to the proprietary Google ROM. So he’s trusting proprietary software that’s filled with spyware over privacy-respecting open source software that can be audited by anyone.

You don’t seem to understand the situation either and you blindly follow some YouTuber. I’d advise you to overthink your opinion on this topic.