Earlier quoted context omitted.
I use an app called AdBlock https://apps.apple.com/app/apple-store/id691121579?pt=425087... It creates a local VPN that sets up a local filtering DNS. I just added the following domains to the block list: facebook.com fbcdn.com fbcdn.net fbsbx.com fb.com
That's very interesting. Does Android have anything similar?
But you have to keep an eye on it because it can get killed when Android(?) thinks it needs the resources for something else. The app has some options to help prevent this but it doesn't always seem to work.