I'm currently on a cut, calorie intake is about 1800 kcal at 260 lbs body weight (6'5").

I'm losing about 3 - 3.3 lbs a week BUT I'm maintaing strenght on all my lifts, even slight increases (reduced volume a bit though) .

My question is - am I losing lean muscle mass or the fact that my strenght is on point means that it's mostly fat?

Thanks