My kids have a lot (probably too much) screen time. None of them watch Mr Beast. I think he is recommended to people who don't have well developed Youtube histories. He is sort of the Taylor Swift of Youtube. She might be a fine musician for all I know but no music service is going to recommend her to a listener it knows wants metal. Beast is a safe recommendation for people who only have a casual interest in what the platform has to offer. He never appears in my recommendations. The algorithm knows better.
We watched Youtube together as a family at first and when the kids got older I helped them find creators and setup their own subscriptions. The worst thing a parent can do is sit them in front of Youtube Kids brainrot. They started with lots of education,science,maker/craft,animation and PG gamers like Hermitcraft.