I grew up with a mum who also believed a main Christmas present was necessary, even if something wasn't needed. For instance I often got given a bike for main present when I didn't really need one, nor was I much of a cycler. Looking back it was just something she bought for the sake of it - nuts.
I have my own dc. Sometimes they've had a considerably more expensive present for a main present, DS had an Xbox last year which he wanted which is fine.
but this year neither of my dc need anything particularly expensive or large or a main present.
dd wants a couple barbie cutie reveals and they aren't cheap. DS wants Lego but will have a few small Lego sets rather than a large one - his attention span js too short for the larger sets. Amongst other things they will like. Dd will get crafty stuff, books, soft toys and kids make up. DS will likely have fidget type toys, books and other stuff I can't think of yet. DS wants monopoly.
my two seem to appreciate the stuff more. My mums flabbergasted they they don't always have a 'main present' but if they don't need or ask for anything it's not needed right?
ds has an Xbox, we have computers, well lots of them actually because Dp fixes computers, also builds his own and a total computer geek. We have an iPad, Nintendo switch etc.
there is nothing I could think of they would need!