No, the tracking is irrelevant. The important point is to establish a shared cultural norm.
In the US, children under 13 are usually forbidden from having online accounts. Do some kids lie? For sure, but the sites will try to ban those accounts.
In practice, this legislation would be very positive because it would establish the expectation that young teens _are not on social media_. This only works if it's national legislation: No kid will feel left out because his/her friends are on SnapGramTok. They are all banned. They can be mad at the unfair government/adults together.
This would need to be ban on specific blocklisted companies and services which might be a good thing because alternatives might arise that could try to do their best to not end up on the blocklist.
In the US, children under 13 are usually forbidden from having online accounts. Do some kids lie? For sure, but the sites will try to ban those accounts.
In practice, this legislation would be very positive because it would establish the expectation that young teens _are not on social media_. This only works if it's national legislation: No kid will feel left out because his/her friends are on SnapGramTok. They are all banned. They can be mad at the unfair government/adults together.