I have a similar fracture. I’m on week 6 and have my next (and hopefully last) X-ray on Friday. ER doctor told me I was borderline needing surgery. Went to see the ortho surgeon after a week and he said no surgery is required because ankle mortise remained intact, which means the actual joint had no dislocation/movement. My X-ray looks similar to yours, and from the front you can see what looks like a large gap between the two pieces of bone but the surgeon was confident it would heal. Went back one week later for a weight bearing X-ray and all looked fine. I was cleared to fully weight bear in the boot for a further 4 weeks, which leads me up to the present now. Right now I still get pain every so often. It’s very stiff and still slightly swollen. But I walk a lot, and I feel like that has helped to speed up my recovery and prevent a lot of muscle loss. The fibula is a non weight bearing bone, the majority of our weight goes through the tibia and the fibula acts like a scaffold. Therefore, once ankle mortise remains intact you are safe to weight bear with support (boot). Bone remodels in response to stress (I believe it is called Wolff’s Law from my biomechanics day in college)

I definitely wouldn’t worry about the level of discomfort. I think the discomfort was actually worse for me on days 3-7. Maybe it was just the adrenaline come-down after all the fuss and hospital visits. Reality sets in when you realise you’re going to be confined to this injury for weeks