Callistemon21
It's a national event of importance, not a family wedding or christening.
Harry is fifth in the line of succession and he should be there and probably Meghan should too unless extreme circumstances prevented them from attending.
Otherwise he should formally request that he and his heirs be removed from the line of succession.
This.
No, it’s not a family event, and yet, in a way it is. All the rest of the family will be there, and it’s likely Charles wanted his son to be there, just as any of us would for a far less important family event. But it’s also a national event, so all the more important for family support, with the eyes of the country and much of the world on it all.