Do speech therapists and speech pathologists have to learn the International Phonetic Alphabet as part of their profession? They might want to learn it, but my question really is: are they required to learn it?
Before I retired (7 years ago) I taught a linguistics course in articulatory phonetics from time to time. About half my class were undergraduate majors in Speech Pathology. So that course was clearly a requirement for Speech Path at that time.
I used IPA in the course, but there was never a requirement to learn IPA. Linguistics is not about learning notations. You can just look at a chart for that.