how big of a deficit are you on?
slim waistline = losing fat = good lor...
losing weight doesn't necessarily equate to losing fat. Since you're lifting you might be gaining muscle as well hence the stagnant weight?

don't worry too much about your weight if you're lifting. Just take progress pics once every 2 weeks (same pose same lighting) and compare...

Assuming 300 cal/day deficit from your TDEE, 300x7 = 2100 cal/week.
1 lb of fat = 3500 cal. So (hypothetical calculation) you should be losing 2100/3500 = 0.6lb or 0.27kg a week.
6 weeks * 0.27kg / week = 1.62kg...

This is all hypothetical calculation but also your body weight will fluctuate daily depending on water intake, carbs, poop...lol

I used to be in same boat as you where weight drop was stagnant for weeks. What you can consider doing is carb cycling. Eat way more carbs on heavy lifting days (to prevent your metabolism from slowing something something glycogen fuel #broscience) and then go low on carbs when you're not lifting.

is that how u got ur 6-pack? by just eating clean all the way?