No PDA
William and Kate chose not to be demonstrative of their affections for a reason. Basically, the two of them were always at work! If you were in the office, it is not considered appropriate for you to hold hands with someone while on the clock! The two of them refused to get touchy when there were cameras present. After all, they are essentially the representatives of the monarchy.
Official Photos
“The Duke and Duchess are almost always seen in photographs taken during official engagements, so they are at ‘work,’ and it would be unprofessional to hold hands,” explained Emily Nash, a journalist working for HELLO!, in 2017. She added, “They also need to shake hands with a huge number of people as they meet them, so aside from being on duty, it wouldn’t be very practical!”