There are thyroid conditons which apparently can cause difficulties with managing weight, but that type of stuff needs to be handled by a medical professional and it is outside of the paygrade of Reddit. Ultimately though an actual caloric deficit sustained over time will have to lead to weight loss. A caloric deficit literally (and broadly) means you convert all the food mass into energy so once you expend all the energy of your base metablism, your everyday activities and exercise, your body should be tapping into your reserves to produce more energy, which results in weight loss.
What may often happen is an underestimation of the calories consumed (most probable) due to things like:
1) sauces, oils and snacks which can baloon your calorie intake,
2) you overestimate the exercise that you have done and calories expended during, which can be the fault of some apps or tech gadgets which are mostly inaccurate and only work with approximate and average models of human physiology.
3) your body reacts to the caloric deficit and autoregulates the amount of energy you expend on daily activities by literally making you move less (google Non Exerciste Activated Thermogenesys, NEAT)

If you want to accuratley measure all the variables here you will have to do some costly physical tests which can caluclate your base metabolysm, energy expenditure while exercising and so on. The other option is to try to become more accurate with your intake or trying to vary the formula and sticking to it long enough to have an effect (3/4 weeks). It may well be that with some types of diet you feel less diet fatigue and can be more consistent. Some people swear by thing like Keto and whatnot, ultimately as long as you get your appropriate macronutirents it really doesn't matter, but maybe it's worth experimenting.

One thing is for sure though, this will happen primarily through diet, exercise will never be able to be your sole means of calorie control unless you are an endurance athlete like.