Meta's has been listening to some concerns after all especially now after some pressure.
These changes very well could help parents moderate their teens. Meta's head of product says these changes address particular 3 concerns in an Npr interview.
Will this be the end of the complaints and concerns geared towards Instagram, probably not.
Some might have different tastes, but teenagers in a larger scale tend to not care about rules and will break them if they feel they're restricted. Depending on what it is, this could be things such as, getting out to some dance, or using social media without parental consent and faking age.