Question for the European contingent regarding teenage/minor nudity

I'm aware of the more relaxed approach to sexuality and bare breasts among some European countries as compared to elsewhere in the world, but how is this viewed when it comes to teens? I've watched a few series in the past few months (e.g. Dark, Les Revenants, La Casa de Papel) that featured topless characters in the 15-17 age range participating in sex scenes, and while I knew the actors were definitely older than 18, I couldn't help feeling a little squicky since they were ostensibly portraying minors. Is this considered at all controversial? I imagine cultural factors like lower ages of consent or Romeo and Juliet laws might have some relevance here? I can't really draw on any examples besides those three series... I know that Mignonnes had its fair share of controversy in the US (despite not showing any actual nudity AFAIK) as it seemed to be a story on the sexualization of pubescent girls, but I never followed how it was received in France.

As a matter of fact, I'm interested in hearing from other parts of the world too.