A question to start with -
Why is the "Killed" Red stamp on the form as the details state he died in Hospital ?
As to the death date, from looking at the others in the list the date on the far left seems to usually be a later date than the date given in the Central box. So is it not possible that the Central box is the date he was admitted to Hospital, and the date on the far left incorrectly given 10/11/23 instead of 10/12/23 ?
Just putting the idea forward .