Only sometimes as a joke. It's mostly used in online memes. Even though, saying things often enough ironically makes you start to use it unironically. From my experience, that's happening with rizz. I'm from Germany and even we're starting to use rizz. It's kind of right between being used jokingly and just being used like a normal word. I also saw people in this thread saying that little kids are saying it all the time but I think that's normal. When me and my friends were in the early years of high school (I think that's the equivalent to weiterführende Schule, it's from years 5-10) we used to repeat memes like that all the time too.
I'm too old for yeet, but I do use 'sus' now wherever I would use suspicious (except maybe in formal settings); I'll save a few syllables where I can for later, as a treat.
Im gen z but feel like that when i do it. Also i think its still completely normal that older people try to adjust to the times and even a good thing. We shouldnt make fun of em, well be in the same situation in a few years, even now with all the slang gen alpha uses. What i do think is important is that we dont use terms like "skibidi" which tbh dont have a meaning. I like using rizz, bussin, *-pilled, etc because they do convey a lot of meaning actually. Especially with pilled you can describe things in two words that would require a whole sentence or two otherwise. They do fill a hole in the english vocabulary.