She's probably getting more pellets than she needs. You could try reducing pellets some. When I had my babies, I fed twice a day(12 hours apart) and enough pellets to last 8 hours, then the last 4 hours til the next pellet feeding, my baby buns would eat grass hay. I found this is the balance that worked best, to provide enough nutrients for growth, and enough hay consumption to keep their digestion moving well(good size fecal balls) and prevent mushy cecotropes from developing. A pile of grass hay the size of their body, per day, is generally what's the recommended minimum amount for rabbits.
https://rabbitsindoors.weebly.com/hay.html
So for your bun, you could try 3/4 cup split into two feedings, and see if that gets her eating hay better. You just don't want to reduce pellets too much at first, only to find out she's losing weight because she isn't actually eating the hay well. So a gradual reduction of pellets, monitor and ensure good hay eating, and once to twice weekly weight checks and check of body condition(not feeling boney) to make sure good growth is still happening, and no unhealthy weight loss.
With the fur chewing, she doesn't look stressed to me, but if it seems like she is acting stressed by being in a new home, that could cause some odd behavior like fur chewing. It may also be due to some stomach upset or pain, like gas pain, from something she's eating. Or possibly from slow gut motility from a lack of fiber, from not eating enough hay.
Usually stomach upset will cause a lack of appetite and other signs of pain, but it's possible for rabbits to manifest discomfort differently than would be usual, and fur chewing at a spot near the belly, could be a sign of this. Fur chewing can also occur from insufficient nutients and protein in the diet, but since you're feeding pellets, they are basically bunny vitamins, so this seems the least likely cause for your rabbits fur chewing.
It could also just be that she got something stuck in her fur and decided she needed to remove it by chewing it out.
https://companion-animals.extension.org/rabbit-behavioral-problems-barbering/