Author's Remarks:
Harry and Meghan consciously made the decision to voluntarily leave the British monarchical family and move to the USA: so why then should they in anyway whatsoever be automatically or otherwise invited to any perceived, by you lot, “royal” and, therefore, by your similarly decidedly rather asinine deduction quite naturally important functions?
It might perhaps arguably be marginally different, although highly unlikely so as well, if Harry and Meghan had decided to continue living in Britain or otherwise alternatively in some nearby country, but they evidently haven't done either of these two things.
And as such unquestionably residing in California precisely on the western side of the United State of America and also simultaneously engaging in a rather full and distinctly independent family life of their own; why then in the actual name of everything that is essentially logical and likewise sensible, would they want to recurrently be invited or effectively too attend, if they were, everything, or anything come to that, that occurred or was about to happen in Britain and that you fatuously fawning serfs consider to be important?