Don't force it is my advice.
My mother over scheduled Christmas day with compulsory joint activities (ram packed schedule from midnight mass followed by a few hours sleep to opening stockings before joint breakfast, more church attendance, walk, another specific charity type very public activity, drinks visits from elderly neighbors during which all family members had to be present, "lunch" at about 4pm but tears and upset if anyone ate between breakfast and lunch, a compulsory "picky" meal together in the evening and then a film), all with lots of rules especially around not eating anything separately, not going to separate rooms, everyone "helping" but in a completely micromanaged way which caused frustration and tension, and opening presents in a painful, ritualistic, drawn out way at various set times, one or two at a sitting - she stressed herself out hugely, got tearful every year if anyone let their smile slip and didn't perform gratitude constantly and we came to dread it.
She meant well but going to my in-laws was such a blessed relief! Relaxed, food and wine based day with just those who felt like it going for a walk spontaneously most years. Sadly MIL died some years ago, but we definitely follow her model with our own kids and teens.
A relaxed day, a warm, cozy house, good food and wine and people doing their own thing in one another's company is perfect. Start demanding everyone join in so you can curate your ideal Christmas, as though there's a hidden camera in the corner and you'll be judged on whether you did appropriate levels of Christmas activities as a family, and it'll be tense, dreary and shit for everyone, they'll resent you and you'll get upset that your efforts are under appreciated.