i dont know how to block this on my kids tablet this is so frustrating and bad by google.
Encourage your kid to be a creator. Not a consumer.
If he's busy building things, he has less time to be consuming things.
Give them a drawing book. Play a sport. Legos. Teach them how to make their own game on Roblox etc.
It's not about blocking your kid from things. It's about enabling them to expand skill sets.