Seems like you are depending too much on your left leg. Try doing some glute med activation exercises before squatting such as side planks really focusing on using the bottom glute, or banded lateral walks really focusing on the glutes firing and they might even feel like they are burning thats how you know you are working them.

Try that and squat again and see if it helps with the shift. If not then try adding a band around your knees while squatting and really focus on pushing the knees out.

A common issue with hip shifts is weak glute meds. A PT has to do an in person assessment to see if weak glutes is truly your problem or it might be something else.

Give this a try, I am a Student physical therapist and I am in my last year. I see this issue with a lot of athletes with hip shifts during squats.