She reminds me of my DD, now 6, and we did homeschool preschool but it was hard as the kids she really fit in with were off at first and secobd grade. I agree, if she has to be there, find topics or themes to spark her interest or pick up on her obsessions. Find library books, poems, songs, crafts, science etc to go with them. There are lots of good preschool and kinder theme ideas and activities in books and online--I just pushed the level of detail way higher, found elementary books that were more suitable. We did the rainfirest, a world tour of several countries, holidays, literary devices, different parts of nature...
Also crafting and getting outside to push herself and commune with nature helped. Each kid is different and you'll figure it out!
