Some theories centered on the health of the royal family. Kate Middleton had recently undergone surgery, and there were concerns about her recovery. Others speculated about a potential illness for Prince William himself. Royal commentator Ingrid Seward later suggested illness might have been a factor.
However, the palace maintained its stance of not elaborating on the personal reasons. Royal duties often come with a heavy public schedule, and it's possible a private matter arose that demanded William's immediate attention.
The exact reason for Prince William's absence may never be officially disclosed. The British Royal Family walks a tightrope between public duty and maintaining a degree of privacy in their personal lives.
In the end, while the unanswered question piqued public curiosity, it also served as a reminder of the human side of the royals, who, despite their lofty positions, face personal circumstances that take precedence on occasion.