The lawmakers that advocate for things like age verification and under [insert age here] social media bans are doing so for essentially the same reason Christian Nationalists advocate home schooling.
They want to shield children from external influences that can dilute the effectiveness of their fascist brainwashing. They hate an educated populace that can think for themselves.
Don't buy any moral panic slop they try to push and contact your representatives to tell them you don't want any of it.