We KNOW Royal Weddings are about ceremony.
We KNOW Prince William didn’t e.g. invite the German ambassador because they are friends.
We KNOW that Prince Harry and Prince Andrew are there to have a role in a state occasion, and if we are interested enough that they are ‘supporters’ and not officially the best man. This will not prevent newspapers and TV speculating about ‘the best man’s speech’, because they are trying to add relatable colour to their coverage and have a lot of time to fill, but really nobody cares. It’s not a ‘bald faced lie’, it’s what the family are paid to do.
What is baffling is why Harry would go out of his way to retrospectively disparage his relationship with his brother like this. Of course the pomp and pageantry of a royal wedding is fundamentally based on a load of old cobblers, but Harry and William (unless they are Oscar winning actors) have always appeared to be genuinely close compared to Charles and his siblings.
My completely inexpert diagnosis is Harry is screwed up by royalty, and this inevitably makes him feel betrayed by William, who from Harry’s POV is the big brother who abandoned him to be King and join the other side.
It’s all a toxic mess.