It doesn't matter whether or not they're consuming common media, it matters whether they're mature enough to actually understand the content or have a nuanced conversation about anything at all, let alone sexuality. 10 year olds are in grade 5. On average they won't start puberty for another 1-3 years. You'll have way more luck talking about Fortnite or Pokemon than The Witcher or Baldur's Gate 3 til they're about 16. They're young enough that many of them will still say "EWWWW!" If they see their parents kiss. Not the age where they're going to understand human sexuality.

A 10-15 year old shouldn't be watching R rated films or playing M rated games in the first place, so shouldn't even be engaging with the part of common media where they would really see sex on screen. They're more likely to see the most useless and poorly implemented censored sex scenes that might be shoehorned into PG-13 or T rated content, which could help explain why it feels superfluous to them.

I think it would be extremely helpful to see the breakdown on this per age year, or even just broken down betwen ages 10-17 and 17-24. A 14 year age gap spanning all the way from pre-pubescent primary schoolkids all the way through kids who have already graduated from university is not a consistent group.