+1 on this one.
However also, FWIW as N=1, I personally seem to have (shockingly) a structural abnormality in my left hip; add it to the list of my messed up body. As a consequence, I have very little external rotation ROM. I couldn't sit <trigger warning> Indian style even in nursery school (still can't), and can't even get into position to do
the "piriformis stretch" on my left side. When Dr.s Petrizzo and Alter examined me a few weeks ago for my back tweak, they were amazed at my ROM restriction there. Yet, I don't and never have had a problem keeping my knees out in the squat.