A simple way to improve squat mobility and work your quads more! Buy a pair of wedges for under your feet (AKA a slant board) to elevate your heels. This will make it easier to get into an upright position and have your knees track forward over your toes to work the quads more. Grab a pair for yourself here: https://amzn.to/3uvRFJ2
Happy squatting!