Gosh, sometimes you forget how prevalent Islamophobia is, and sometimes you read a thread like this.
OP: For Eid, my (Arab, Palestinian) extended family go out for a lovely brunch together at an Arab or Australian cafe, no preference. After month fasting, it's lovely to enjoy a leisurely brunch and coffee!
Then we go home and a lot of people have a nap, to be honest.
For the main meal- the food doesn't really matter all that much. We eat obviously traditional Palestinian food. Then sweets! You could make a lovely cake, whatever your daughter's favourite is. If you want to cook something from the culture of your daughter's friends, maybe you could reach out to one of them and ask for a recipe, or for them to put you in touch with their parents for a recipe?
On Eid morning before all of this, we go to pray together. Because it's everyone at once, it's not in a mosque but a community hall or park (weather dependent). Maybe you could look up local Eid prayers and take her? You would be very welcome to come and hang at the back or in the car. You don't need to wear a headscarf. (ETA- I'm not saying this to try and stealth convert you lol. Just that it's the main religious event on Eid really)
We also put on the local Muslim radio show as soon as we get up, because it is live streaming the traditional pre- Eid prayers chant (takbir) which really starts the day in a very Eid mood.
I hope you and your daughter have a beautiful Eid. She is very blessed to have you.