Well. Ha. Just lost about three paragraphs of an answer to you! Switching back and forth between open sites to do research. Cleared up a few open links - including what I’d just written. I’ll recreate it tomorrow.

A few things -
Have you looked at a peripheral nerve chart and dermatomes? One will show what muscle function is associated with the nerve, for instance if your laminectomy was at the S2 nerve level it would involve plantar foot flexion (pushing foot down - toe pointing down) and foot eversion (foot roll to the outside, pressure is on a flatten arch and big toe side). The chart shows what movement and body part each nerve activates.
https://www.orthobullets.com/spine/2002/lower-extremity-spine-and-neuro-exam
The dermatomes shows the connection between the nerves and the area of skin sensation. S2 affects a strip all the way down the back of the leg, under the heel, and a small area into the arch.
https://en.wikipedia.org/wiki/Dermatome_%28anatomy%29
The dermatomes may show where the sensory damage is in small fiber neuropathy. The forminal compression may affect the nerve function as seen on the chart that indicates muscle movement. You might be able to back track - go fromwhere your pain is, or where your foot wobbles, and follow that up into the spinal nerve level.

Will post more tomorrow and try to answer your questions in chunks.

Full disclosure - I worked in the pediatric OT area in the K12 schools. I am happy to help explain, find research, access OT resources I might have, and give an educated opinion. But I was not a rehab therapist, although I was trained in rehab, brain anatomy and physiology, and neurology. My last 12 years of work was in the OT assistive technology area. I retired in 2019, but keep my license up to date.