i dont think PM Lee needs to bow at all.
As for the gap between the two of them during this inspection
ceremony,
PM Lee's entourage should have advised him,
meaning that he would have been informed that Angela would have
stopped halfway and bowed, where he is required to wait for her or
take smaller steps.
The issue here is PM Lee or his entourage that is causing this
embrassement moment?
Maybe all these arent worth the debating factor,
as the angle of the picture shoot is also in question.