This study on autistic burnout from the Academic Autism Spectrum Partnership in Research and Education at Portland State University notes this distinction between autistic burnout and depression. Autistic burnout…

Notably did not include anhedonia (not caring/feeling); if anything there was a pervasive frustration because people continued to care and feel but felt incapable of taking action on their feelings

Source: Autistic Burnout: “My Physical Body And Mind Started Shutting Down”

That aligns with my experience. Pervasive frustration indeed.

What is autistic burnout?

Autistic burnout is a state of physical and mental fatigue, heightened stress, and diminished capacity to manage life skills, sensory input, and/or social interactions, which comes from years of being severely overtaxed by the strain of trying to live up to demands that are out of sync with our needs.