1500 cals a day losing weight too slowly?

I am 16 started at 225 am now at around 188 in about 4 months I go to the gym 5x a week for strength training but other than that and school I don’t move much I eat 1500cals and 170g protein daily minimum

This is my first time ever dieting

I have been stuck at ~190lb for like 3 weeks now
And I don’t really know what I’m doing now I always get my calories nearly perfect every day I weigh my food and keep track of everything I don’t do cheat meals like ever but I feel stuck. I feel like nothings changed in a while. I’ve gotten quite a bit stronger so it might be muscle that I’ve put on but I don’t think it could be that much, I don’t know if I should increase my calories or decrease or if I just need to be less lazy and do cardio again. But after school I lift weights and on my rest days I’m exhausted to idk how I would even fit it in. I just want to see some more progress