Flipping back through some of our previous correspondence, I notice one trail that might be worth investigating is speech and language evaluation, to look at whether there are subtle expressive/receptive language deficits (as distinct from her very high verbal cognition). I would suggest that this is best in the context of a comprehensive neuropsych eval, which you may be able to access through your primary care physician.
I don't know this program specifically, but one resource might be something like this clinic in collaboration with UCLA:
https://www.thehelpgroup.org/professional/the-help-group-ucla-neuropsychology-program/
