If you are not able to breathe while doing the mobilization you are going too deep.
It should not hurt 2 hours later. Pain is not the goal.
Good that you don’t have symptoms of OA at this time.
A couple episodes to check out
Episode 87: Hip Impingement 2: Band Variation
Are you rolling out your quads using a roller or ball such as the supernova or yoga tune up therapy ball?
Missing hip internal rotation is a contributing factor to needing to turn your feet out when squatting.
Episode 230: Squatting With Turned Out Feet? Hey Duck Squatter, IR Yourself.
Pre-Squat Hip Opener Mob-Rx | Mobility Project Episode 363
How is your ankle range of motion?
This can impact squat stance.
Are you seeing improvements with the work you are doing?
Great that you are working with someone on nutrition.
Questions let me know.