Pretty much the only reason to be careful of oxalates are if you are dealing oxalate crystal kidney stones.
Phytic acid is not a problem for health, because the foods highest in phytic acidA - have a lot less when prepared properlyB - help you live longer and healthier when you eat more of them.
I’d probably take a grain of salt from whoever is recommending she stop eating them, sounds like a carnivore/keto practitioner who is not evidence based.