You need to change the fun stuff. deliberately find things that teens and pre-teens like.
we will be lighting the fire and eating oven baked Camembert with tacos on Christmas Eve with teens, and play some board game, probably Settlers of Catan. (or maybe Poker)
Christmas morning has a new shape, no earlies for the teens, instead coffee/hot choc and pancakes at about 11, downstairs with stockings.
We now do presents later in the day.
This year we are off to my brothers, so they will have to get up, so we will have slightly different breakfast and stockings.
Lunch can be later (when small it had to be at 1) adults get to snooze while teens chill with cousins, then they all do a retrograde charades things 'for the little ones' (who are now 11 and 12)
Followed by some large family games with all of us. (red Herring being the favourite, for some unknown reason)
I also get them to think and buy presents for siblings, parents and grandparents - usually £2 each, not much, grandparents often homemade. But the buying and choosing is fun with them, as they dip into the world of Argh, what do I buy for x?