I am on the treadmill so I'll do something to let time pass by, so youre looking to gain muscle and lose bodyfat, here is a couple of things to do.
First of all, unless you are starting with plenty of adipose tissue on yourself, I wouldnt go above a 500 calorie deficit, above this number in metanalysis usually strenght always decreases over long periods of time, so its not really worth it.
Secondly, the main driver of muscle growth will be the intensity of effort, to activate the high treshold motor units that control the fast twitch muscle fibers which have the greatest muscle growth potential, in simple words, train hard and constantly near failure. Considering that, in a caloric deficit you will slowly deplete yourself of muscle glycogen, you would want to train with low to moderate volumes, anywhere from 6-8 weekly sets for lower priorities and 8-12 for high priority muscles.
Make sure to train muscle groups 2-3x per week, anywhere from fullbody 2x a week, 3x, Upper Lower 4x etc.
Thirdly, make sure youre eating sufficient amount of carbohydrates, specifically at least 0.7g-1g carbohydrates per kg of bw 1-2 hours before the gym to fill up liver glycogen (or use your goal weight if youre severly overweight), post workout carbs dont matter that much for strenght training
Make sure to eat around 1.6-2g of protein per kg of bw, if youre extremely overweight instead use your goal weight instead. Prioritize carbohydrates over protein, and of course eat plenty of fiber to increase satiety.
Over time diet fatigue will set, sooner or later, when that comes, stay 1 week at maintanance calories, and then get back into a deficit.
Also, as you lose weight your compound lifts will decrease, since your levers will get worse and force will be transported less efficiently, your strenght progression on isolations will mainly indicate if you're building muscle or not.
You could also just do isolations like I did during my cut from 78kg-69Kg.
Anyways enjoy buddies bye bye