I’m a PT myself and have had issues with this. Every time it was due to bike fit and most importantly cleat positioning and the lack of varus wedges under my cleats.
I think stretching and strengthening your glutes will help but if your fit is causing too much knee varus or your Q angle on the bike is not optimal it can cause lateral knee pain regardless of fixing any impairments knee your body . Have them look at the cleat position in terms of lateral placement and in terms of the angle it’s placing your hip/knee during your pedal stroke. And have them look at this in relationship to your hip anatomy and how your specific angle of patella relative to your hips is interacting with your bike.
Good luck