Best online therapy for anxiety... how do you tell who to go with?

Every therapist profile outlines what they specialize in: anxiety, depression, stress

Okay but that doesn’t really tell me who works with anxiety all day versus who just has it listed because basically every therapist sees it.

I’m trying to find the best online therapy option without booking five different therapists just to figure out who actually specializes in it.

How do you tell before session one?