I by my DC 3 presents for their birthdays and they are SO excited. They actually open and play with them too because there aren't so many!
I understand
We have very very little family buying for our DC too. DP has no family at all on his side, I only have my mum who will also buy a small token thing on behalf of sibling but apart from that, it all falls on me. We don't buy gifts throughout the year so really want to get them some wow things on Christmas.
It sounds like you've done really well for your DD. Kids don't compare the way we do and the way we think they do. Unless they're literally there opening 2 small things next to a child who's opening a mountain of gifts, they really aren't going to care. I also get new essential things like pajamas, stationery, cute toiletries. In fact I wouldn't consider it Christmas without them!
Kids also don't understand the value of money. One of my DC has a pack of toy cars that cost £10 from Smyths, I know it will be one of his favourite gifts and it's a big one too!
It's just not worth comparing what others do. Some people simply have more disposable income. Remember it's you dreaming of your DD having all that stuff, not her. My DD looks forward to the activities and fun on Christmas, the gifts are a nice bonus.
If you need ideas for gifts to "bulk out" the pile a bit, I recommend things like cupcake kits (£1 - £2 in supermarkets) sticker books, cheap craft kits from the Works or similar, and primark for cute things like bath bombs, lip balms etc.