There are a number of resources from the Therapist Neurodiversity Collective that may be relevant: https://therapistndc.org/education/ (you can use ctrl+F to search the page for "therapy" or "therapist" to narrow down more relevant ones.
https://therapistndc.org/therapy/
For additional learning, the Facebook group called "Ask Me, I'm an AAC user! (24 Hour Rule!)" is a great space with overlap for SLPs especially.