Starting to regain movement at 8 weeks is, from a neurological perspective, indeed a very promising sign! Please don't lose heart now.
Gentle range of motion by hand will keep things from tightening. Light stimulation by your fingertips, and spending a bit of time each day visualizing things moving while touching and trying to elicit movement, may help. I know it sounds "woowoo," but it coordinates the various parts of the nervous system and I have seen it help people after injuries.
I've been doing both feet together quite a bit. My PT said it helps the brain realize the other side is supposed to do stuff too. And I noticed that curling my toes had gotten difficult, so I started working on that as well, just to help keep the tendons flexible. I've also been trying to help it while really focusing on trying to move it, and while I haven't seen any movement, there are times I feel the nerves tingle below the big toe after trying. I'm trying not to get my hopes up too much, just in case, but I'm pretty hopeful for at least some (more) recovery. If I could get the pinky numbness on the bottom to resolve, the rest isn't the worst thing in the world. Not ideal, but the knee is doing well so far, so either way, this is already better than before for the knee.
@KJ24 one of the things my doctor is confused about is the issues are from different nerve groups. He was thinking it may be from the back as I have DDD (Degenerative Disc Disease), but I've never had issues on the left side before. Not saying it couldn't happen though, my pelvis tends to shift around a bit and sit kind of canted. I did start seeing a chiropractor at the beginning of the month, just to see if I could get any relief there.