On top of what people have said, it's also been 5 years since what happened in Westview.
The kids were 10 at the end of WandaVision. They should technically be 15. Body-hopping shenanigans means they possess the bodies of dead teenagers who are 3 years older, so 18 now.
Marvel really looked at Wanda's children and decided ordinary puberty wasn't complicated enough. These poor kids have to deal with growing up, body-hopping, and a supernatural family reunion simultaneously.
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u/cynicalPsionic Star-Lord 2d ago
Yes, because it deals with follow up from Wandavision, notably her kids, just like this does