That would be the status quo if we had better parental controls.

Trying to enforce parental controls via regulation may only be as effective as Europe enforcing the DMA against Apple. But maybe not, because there's a huge market; if Apple XOR Android does it, they'll gain market share. Or governments can try incentive instead of regulation (or both) and fund a phone with better parental controls. Europe wants to launch their own phone; such a feature would make it stand out even among Americans.