QM is far more restrictive than GR in those first nanoseconds.
No, GR was proposed as a powerful but general model to address the Static Universe, which was the popular model in the early 1900s. It was Lemaitre, and a few others, that recognized that GR fails to support a Static model.
To suggest GR is the problem for the early nanoseconds in BBT discourages my interest in any lengthy ATM suppositions.
Perhaps if you could present some short and simple nuggets to help give us stepping stones to your model, then you may find more participation. There are many, many ATM ideas out there that deserve little to no attention.
But, be sure to demonstrate objective evidence for any non-mainstream claim. "Word salads" are far too common and far too worthless, most often.
Well, with his clout, he'd have no problem. But he had no clout when he published his SR theory. But it was published because he offered a solution to the objective evidence found in the Michelson-Morley experiment regarding the aether and light.
I'm unclear what you mean by "possible times". If you mean at t=0, then yes, there is no scientific theory for this.