My daughter, around the age of nine or so gave up pork. She always loved pigs, but still ate pork and loved it (in all forms). But when she was about nine she went to the zoo - and the highlight was always to see the pigs in the “farmland” area. Except the pigs weren’t there! That is when she gave up pork - she knew the pigs didn’t get sent off to slaughter, and they were there the next time - but it just triggered something in her mind.
We didn’t push it, and we didn’t give up pork.
Just a little while ago, at age 14, she piped up while mom was making breakfast “Mom - can you make enough bacon so I can have some too?”
I was very proud of her for making her own decisions on what she wanted to eat, and for how she stuck to it over all those years. (And never gave us grief for eating it). But also that she came to terms with it on her own as well. And told her all that too.
When she had her first bite of bacon again she said something like “Boy - I’m glad I didn’t give this up for good!”
Unless it does them harm, I think it’s always best to let kids work things out in their own time and their own way. That is, assuming a fairly reasonable kid. Hovering and/or domineering parents never seem to do themselves much good, and only make the kids more determined to rebel against their authority. You showed your daughter you respect her, and that is worth an awful lot.