Laptop only using 5.7GB ram out of 8GB

I have an Asus IdeaPad 3 15ARH7 It has a dedicated gpu that it's been the main for everything, but idk what happened but when i checked today i use quite less ram than expected, heard about iGPU allowence but idk why would it allocate if i use the dedicated gpu. Any way i can fix this or at least make it use more ram