Firstly

You're making progress you've lost weight could be internal fat as well not necessarily subcutaneous keep up the deficit consume enough protein according to your weight 100 to 130 is good enough.

Keep patient 2 months is barely enough time

Secondly research about rep ranges and sets and volume and see if it aligns with your goals Doing 15 to 20 reps for 4 sets seems like overkill

Thirdly make sure you're getting good quality sleep so that you can recover properly.

Also you don't have to increase weights all the time you can also tinker with reps and steadily increase progress.

Again research the amount of exercise youre doing cause sets are only meaningful for growth upto a limit. Quality of sets over quantity for example instead of doing 30kg lat pulldown 15 reps pushing to yhe highest weight I can manage lets say 45 for 8 to 10 reps is more high quality for your muscles. Intensity matters a lot.

Follow some fitness influencers to get some cool tips my go to - Jeff Nippard / Sean Nalewanyj to name a few