1200 cal deficit. (From 170lbs to 154)

I’ve been on this calorie deficit since like the last week of April of this year. And yes I’m losing weight. I see my self way less fat and I think I lost some muscle mass but tbh e goal rn is to lose body fat. But now I’m starting to wonder if it’s a good idea. I work out 4x a week with 2 hours of weight training and 30min cardio. I eat around 140g of carbs 160g of protein 36-35g of fiber and sleep like 6-7 hours every day. So my doubts come from seeing a lot of people online say “it’s too low, dangerous or harsh”. I don’t really know anymore but I feel better than ever tbh.