There's also this company that caters to this sort of thing. I've been considering moving to this someday, maybe when my current phone dies. I'm the kind of person that needs a genuinely dumbed down phone to limit access since I'd just get the key out of the drawer and 'cheat' eventually.
Your phone minus the distractions ( getbrick.app )
This is actually pretty brilliant and innovative....
I'm just here to laugh at Spongebob memes ( programming.dev )
Oh and banned for rule 1 if you disagree