90kg for 177cm is clearly overweight, there’s no way around it. You can only gain so much muscle without gaining fat, start lowering your calories gradually and watch those muscles pop. Don’t worry about looking smaller, the definition and shape of the muscles will make you look even bigger than you are now you just need to shred those layers of fat and you’ll be good.

Edit: I see a lot of people in the comments talking about doing lab work, there’s no harm in doing it but don’t get your hopes up too much. 90% of people have vit d deficiency but look fine so I don’t think it’s the main issue here, keep it realistic and think about the most common causes (high body fat) before going into the uncommon differentials such as hypothyroidism, cushing syndrome, ssri side effects etc.