The top part of your foot is called the Forefoot.
There are other names for the rest of your foot but the front and top of your foot is called the forefoot.
Just like the front top of your head is called your forehead it's the same as your foot but instead of forehead it's forefoot.
The middle of your foot is called the Midfoot and the rear of your foot is called the Hindfoot.
Both your midfoot and forefoot constitute the dorsum which is the area facing upwards while standing and the planum.
The area facing downwards while standing.
The instep is the arched part of the top of the foot between the toes and the ankle.