Are those seats for the Royal Family??? Or clergy or people with roles? Whoever said Harry is sitting third row might be making stuff up. Gonna do a mock draft of the seating plan!!
Do you mean the burgundy chairs on the right?
The flags of the fifteen realms are placed directly behind these chairs. And there will be fourteen Governors General plus their spouses for those that have them. So maybe for them?
Why are the throne chairs on stages of equal height?