The official description of the thermal interpretation of quantum physics can be found in my just finished papersI think Dr Neumaier has a good point - QFT may indeed be a better place for interpretations. I do not know enough of his thermal interpretation to comment on its specifics.
Foundations of quantum physics I. A critique of the tradition,
Foundations of quantum physics II. The thermal interpretation,
Foundations of quantum physics III. Measurement.
They are also accessible through the arXiv at
arXiv:1902.10778 (Part I), arXiv:1902.10779 (Part II), arXiv:1902.10782 (Part III).
This is a very long thread. If you are short of time, start reading at post #260. DarMM gave in post #268 a nice summary of the thermal interpretation. The simplest quantum system, a qubit, was already described by Stokes 1852, in terms essentially equivalent to the thermal interpretation. Post #484 is my very short summary and post #479 contains links to my explanations of the connections between theory and experiments. Open problems related to the thermal interpretation are discussed in post #293.
Two related threads are about the thermal interpretation of the Stern-Gerlach experiment and about an example illustrating the differences in the interpretation of measurement results in the thermal interpretation and in Born's statistical interpretation.
Three reviews (Part I, Part II, Part III) are on PhysicsOverflow, together with some comments by me.