Is she eating enough to maintain weight? Macaws will do the slow head bobbing to solicit food when they're hungry.
For the pesto, I'd use around 1/3 almonds, 1/3 pistachios, and 1/3 pumpkin seeds. Make it so you'd eat it, and give her her own portion while you eat it. She might enjoy red pepper flakes in hers, too.
I don't think hand feeding her is bad. Macaws in the wild will still take a feeding from a parent well-past weaning if they are upset, scared,etc. Last night, Daphne got excited while I was feeding Annie, so I gave her a Dixie cup of formula, too. IMO, it's good for her to know that you'll take care of her needs. I wish Annie would wean, but she's getting formula as long as she "asks" for it.