Sometimes too you might even need to give up on the idea of holding food for them and just place it nearby. She's smart, she'll still know it's from you if this happens.
But I don't think you are at that point, it sounds like she's making progress and good choices. I just want you to know food guarding might end up being part of who she is.
Peanut went through a very long stretch, think years, where I was not allowed to touch her food. She was tame and cuddly this entire time, just touching her food was not okay and she would bite. Sometimes I could feed her from an open palm but actually holding food between fingers would trigger a territorial response.
Probably 4 of the last 5 times she's bitten me the last couple of years (Peanut doesn't bite often anymore, mostly just little nips) were because I was trying to feed her nutriberries from my palm.
It's only been the last couple of years I was able to get her to the point she will eat peacefully from my palm again. First low value food she wasn't as protective of, like pellets, then most other things as she started to trust it was okay more and I wasn't "stealing" her food.
Feeding her nutriberries in my palm is still terrifying so I just don't.
You could just see her getting angrier and angrier as she ate but don't dare move or try and dump her off or then she'd really bite! I just had to hope she finished her snack before she reached her breaking point!