The things changed in the teen behavioral scripts are so dumb that the status changes make it impossible to make a properly working mod regarding the sex mod for teens, and I think this will be in experimental forever. I don't think this is worth the trouble and luck roll. Like I said this worked for me only once for several attempted new games. If it was in your household then you don't need to do those steps (adding and removing) your teen now is free from school, doesn't have anything to do, and is probably ready for you. Now you can remove the teen and they will return to their household. then age them back down (this is why you needed to add them to the household family) you will receive information that high school is over and the teen graduated.

Load game and try your interaction with the teen, if they are still not responsive, age them up. Save Game leave to main menu, no need to restart game. go to WW settings and look for sex triggers for animations, you will find things like height check for animations.

adding post puberty is necessary but it complicates things because the teen now enters the late high school stage status (they will be stuck where (they were previously though). check if the original household doesn't have some other children, if not cheat menu and remove trait caregiver and save the game, leave to main menu or exit gave (preferred) check their JOB (school) status,this is now broken into 3 stages, a new game will show you grades and stuff, and it will get confusing. take note that pretty much ALL teens are now part of one or another club, convince the teen to quit the club,

Add the teen to your family through cheat menu temporarily, It's a little complex, long, probably not even worth it, but it worked once. I found a workaround but it only worked 1 time out of 10 new save games attempts. There are around 2 stages for teens now and it all runs on a single script which I find baffling if it wasn't intentional. Game devs heavily modified teen age statuses. There are multiple reasons why this doesn't work properly even with the inappropriate mod.

Sims 4 mod wicked woohoo