Just to add clarity to what I think the person above was saying, a lot of the conditions SLPs help treat have nothing at all to do with the voice or language. For example someone who has no changes or problems with their speech whatsoever but has problems swallowing may get benefit from seeing an SLP who is a Board Certified Specialist in Swallowing and Swallowing Disorders (BCS-S) and primary/exclusively treats patients with dysphagia.
That said I have no opinion whatsoever on whether that is relevant or useful to you. Just clarifying the misleading nature of “speech” front and center in “speech therapist.”