I've definitely have had occupational burnout. My trained occupation, social work, was pretty brutally and self-evidently unethical, and my awareness of the harm caused by all of it has only grown over the years; there's also an autistic component of needing to get along with tragically neurotypical co-workers. All the other jobs I've had have been based on taking as much money as possible from people, either directly or as the entire mission of the organization ...

It's perfectly possible I'm suffering from both autistic and occupational burnout, but recovering from occupational burnout would require me to muster enough attention to pursue skills that grant me better occupational options; I am ensnared and the more I struggle, the worse it gets.

Re: polyvagal theory. I hear that theory mentioned in The Body Keeps the Score and EMDR, and in both cases it's been criticized as having weak evidence, but if you find the conceptualization helpful, I'd love to hear more about how it's useful for you.