If sumo squats hit your quads or lower back instead of your glutes, your stance width, foot angle, or hip hinge might be off. Focus on pushing your knees outward in line with your toes and driving up directly through your heels while squeezing the glutes at top. Reviewing upper and lower body alignment tips at https://betterme.world/articles/calisthenics-arm-workouts/ helps maintain proper posture across all home bodyweight exercises. Tweak your form and feel the targeted activation!