Your post makes it sound as if the only reason Meghan wanted to go was because she didn't want Kate, as she perceived it, to have the preferential treatment of being close to the Queen as she lay dying. Whaaaaaaa, why should she be there, I wanna be there.
'That's all you needed to say', i.e. Kate isn't going to be there because she has a sense of decorum so I won't make a fuss about Meghan being there. Good grief.
Harry said his father disrespected Meghan, but didn't say how. TBH if it was along the lines of the pair of you have succeeded in making your grandmother's last months on this earth stressful, sad and troubled, you're not making her last moments the same, now sod off, who could blame him.