Stalls are so frustrating but you really just have to let your body take the time it needs & your weight loss will start again. I never changed what I was doing, stuck to my plan, & the stalls always broke.
Constipation is a constant companion for many of us. Are you adding a soluble fibre to your diet? I used to take a stool softener if I got to day 3 without any movement. This stopped me getting to bound up & then having painful movements. Are you still meeting your daily fluid goal?
Do you track your calories & measure & weigh your food? Were you given caloric goals as well as protein? if you are just guessing or eyeballing it, it can be easy to over estimate. Not everyone is given caloric goals. I wasn’t but I was given advice on portion size progression. At four months I was eating about 1/2 - 3/4 cup of food. I did random checks of calories & was around 700 at that time. Many eat much more than I did.
I prepped & cooked almost everything I ate myself so I had control over the ingredients & how things were cooked.
Breakfast was scrambled eggs (cooked two eggs & took 2-3 days to eat) or rolled oats (3 days to eat a single serve).
Lunch was meat (chicken tenders, white flesh fish, smoked salmon, pork sausage, dinner leftovers, etc.) Often that was all I ate - just the protein. Sometimes I’d have a little cucumber or green vegetables.
Dinner was basically meat (pork, lamb, chicken, beef, fish) with vegetables (combinations of green beans, cauliflower, asparagus, sugar snap peas, cabbage or broccolini). Sometimes I made soup with meat, vegetable beans or lentils. I made rissoles (meatballs) a lot - easy to portion, freeze & reheat - & zucchini noodles bolognese. I portioned & froze a lot of what I cooked. Made it easy those frequent nights I wasn’t very interested in food - just defrost, reheat & only prep vegetables if needed. Easy & quick.
I ate two snacks: a high protein yoghurt or yoghurt drink & either cheese or fruit.
Good luck.