The "flap" has turned white (). Is this the normal color? I'm assuming yes because it's the color of skin with no blood in but I just want to make sure.
No blood supply means usually dead skin, just hasn't turned black yet. Gracie Rose had the same problem a few weeks ago, a three corner skin tear from a dog bite. I trimmed the area cleaned it a couple of times a day with saline , used Polysporin, numbed and trimmed the skin flap. It's all healed and fur is starting to grow over the area. You may have to trim the skin flap as it dies or earlier iif you have some Lidocain gel or something to numb it with.