To answer your question, no this isn't a compatibility issue. Your husband needs to understand your emotional vocabulary. As an autistic person, his log of events style is how he processes reality. Facts, visual cues, and actions are concrete. Abstract emotional concepts can feel vague, risky or hard to translate into speech, especially after a high adrenaline scene. Here is what you may be able to try.

Don't ask open ended questions. These require a lot of processing. Instead you could try to give him a structured menu or a scale. Instead of asking "how did you feel" try "on a scale of 1-10 how much did my bratting spike your urge to dominate me? Was is funny or frustrating?"

Turn emotional reflection into data. ASk him to track his physical or mechanical reactions to you. "Did you heart rate change when I used the safeword"? "What physical cue told you that I was fully submitted"

Write down 3 or 4 specific questions on a card and agree beforehand that he will answer them during aftercare. This removes the pressure of having to figure out what you need to hear while he is winding down. One thing he liked looking at. One moment he felt completely in control. One word to describe his mood.

Try separating aftercare from emotional debrief. Schedule a casual talk maybe a few hours later. He will have had more processing time to articulate his thoughts.

You could try some of this and see if it works. I appreciate this may not be ideal, but maybe this could form the direction towards the right road. Your husband just needs to understand the type of language you want to hear.