very very sorry about the difficulties.

Years ago...well, literally 40 years ago, I was working in a warehouse, as a shipping clerk, standing on a concrete floor 8 straight hours. My feet were killing me. At the time I was a jogger and I had a nice pair of professional running shoes...with closed cell foam. So, I just started wearing them at work.

So, so, so much easier on my feet.

So, I wonder if some better kind of more professional footware might help some? I guess you have already tried....

I know that Hatha Yoga has inverted positions. They are supposed to help the circulation. An inverted position is a headstand or a shoulder stand. But I imagine, just elevating the legs, probably, particularly over the heart...you know, with a bunch of pillows or maybe even a box topped with a pillow...

Maybe those kind of exercises would increase circulation a bit?

The idea being that the vessels carrying blood to the feet are work with gravity. And if you force them to work against gravity, it strengthens them.

Generally, might be worth looking into what massage therapy, Hatha Yoga, Tai-Chi, and these kinds of natural therapies do re neuropathy. I mean, if they are just talking about stretches and positions and such, can't hurt, right? Seems worth looking into.

Here's an article from Dr. Andrew Weil. He is an Integrative Medicine MD. Means they are MDs, but they also explore natural treatments sometimes:
https://www.drweil.com/health-wellness/body-mind-spirit/diabetes/neuropathy-symptoms-and-treatment/
take care.