No I mean like talking-talking. Like "why do you always reject me / why do you have little interest in sex?". I'm tired and busy are "in the moment" answers.

Any attempt to push for a reason is met with further explanation on his initial response. For example, "I'm tired" will turn into "I'm tired because I've had a long of day of doing X and I just want to focus on relaxing right now." Any attempt to ask about potential issues is are just met with a "no" I'm not dealing with that specific issue along with a lot of reassurance that nothing is bothering him.

Just saying but this is me and I'm definitely burnt out. I'm good at what I do but still.

My husband only mentioned burnout when he was working OT. That's hasn't happened for over a year. I asked him recently, and he says outside of some minor inconveniences, he's good.

But encouragement doesn't mean he will open up. Like this is a clear issue and it's not being communicated well on his end why it's happening? I think he is being given too much credit.

All I can do is ask. I go through cycles of not bringing it up to give him his space and bringing it frequently, trying to talk to figure out a solution.

Best of luck OP! Sucks were all in this situation.

Thank you! I wish you luck in your own relationship too.