Can you actually meaningfully slow down your metabolism from prolonged weightloss?

Since february 1st 2025, I was losing weight from 230lbs and I got down to 200lbs around may and after june I stopped working out and my activity level went down, but I ate low calories to at least maintain my weight so I wouldn't completely lose progress. Overall I gained a lot of muscle (I was on PEDs) and lost a lot of fat that year. Starting from jan 1st 2026, I've been trying to lose weight again (goal of 175lbs) and somehow I've maintained my exact weight (measuring daily) from eating 2000 calories daily when last year I was eating 2200 and losing like a pound or more every week. Overall, I am the strongest I've ever been, and I am the leanest I've been except for maybe years ago, but the fact that my weight isn't going down from eating 2000 calories daily kinda worries me, especially since in 2022 I got down to as low as 170lbs from eating 2000 calories daily when I had no muscle and didn't work out. I thought I'd surely be losing weight given how heavy I am and how in the past I could eat more and still lose weight, especially since last year I could have had up to 20lbs less muscle than I do now and last year I spent all my time playing video games when I wasn't working out, so I would assume my TDEE wasn't what it is now that I am currently doing daily cardio (30min 5% inc 5.5kmph). I know the answer to all this is to lower my calories to like 1800 for at least 2 week to see how that turns out, but I still am curious, could it be from the macros of what I've been eating or something else like metabolism? I will admit, I have been consistent with my calories but my actual food choice has been lower quality than it was last year, but I thought calories were just calories, and I certainly hasn't been harming my workouts.