I can give you an idea for the lower flap that may help it heal together. It would require breaking some of the crust though.Yes, the one flap on right side is shrinking in size. It was much larger. The large slice on bottom that’s about 1/2” deep still hasn’t healed much and does like to accumulate the fluids from meds and wounds weeps, but I keep spraying it and trying to wipe it with neosporin. The top part looks gross, but it looks like it’s healing. It’s mostly crusted over, which kinda makes it harder to keep clean, especially feathers and other crap that want to stick to it.
If you have some medical self adhesive wrap, you can wrap the flap so it's pushing on the other open area to get it to heal to that. But first step is to break the crust before doing so. If it bleeds alittle, that's okay, the healing together will work better.
The wrap must be snug, but not squeezing. Do not cover the entire area, just use the wrap to put pressure on the flap.