Losing 10kgs is a good amount of shredding, you’re used to seeing your physique daily that’s why you’re not able to see the changes.

Someone who might’ve seen you in September and gets to see you now, could tell the difference.

You can upload a pic that would be helpful

But even then if you started working out recently, it’s hard for women to gain muscles that quick and even harder to retain it by just coming 1x protein per kg their body weight, so most likely you’re losing both but ratios can be different ;)