Mine are 16, 14 and 11.
The 16 year old and I walk/ hike together.
The 14 year old games with DH sometimes and they talk about video games, programming, hardware and tech generally, and he games with his brother other times.
I listen and try to understand when the 14 and 11 year old talk about computer games or the 14 year old talks about this dream PC set up or the driving set up he's building (and drive him to the DIY shop to buy supplies) or the 11 year old talks about marvel or greek mythology or the comics he writes...
I attempt, really badly, to play the video games nobody else will play with the 14 or 11 year old because they're the only one who likes that specific game (tbh I only do this rarely if they're having a rough day and I have the day off).
I'm going to a concert with the 16 year old soon (her idea).
The teens talk about music with DH.
A lot of it is about trying to take an interest in things you'd never be interested in unless the person talking was extremely important to you 😜
Also the 14 year old still has time limits set on his gaming devices and phone and joins the family when he's run out of gaming time 🤣 He understands as I frequently mum-splain why this is for his own good - its not worth complaining as I'll start mum-splaining at him again 😜
We do watch films together at weekends. They still want to do this - snacks help.
We go to theme parks together as part of long weekend breaks but only in school holidays.
tbh a lot of it is luck though - my teens are surprisingly civilised and love the youngest openly and actively seek his company. They don't complain about films needing to be suitable for him - but he does get to watch the occasional 15 with the family if its something we judge probably okay, and none of them watch 18s (16 year old would be allowed but doesn't want to especially).
I often think my teens aren't really teen-ing though... I'm honestly not sure why, I think its just personality!