It can get better with time (6 months). Epidural steroid injections can be effective too. A redo surgical decompression has about a 50% chance for some improvement but the skills to remove adhesions are in the hands of very few surgeons.
Not to interject, but I had a lumbar fusion a year or so ago with one of those few surgeons, and I cannot stress enough how much of a difference it made. I am entirely pain free and cleared to jump out of airplanes (not that I want to, however).
I would name the surgeon, but am not sure that’s allowable here.