probably professional name.
turns out this surname thing isnt so formal for royals. example, Kate hasnt adopted one, just dropped Middleton, in 5 min searching found many publications refering to her by maiden name. both Princes adopted Wales as their name when in the forces, though...
one of the reasons for missing context is trailers, teasers and pre-release press snippets have led that line. people and press haven't seen full epsiodes but have seen those peices over the previous week. that all cames from Netflix/Archewell to ramp up controversy, because without that the...
now you mention it, yes always. hasn't really registered she is Princess of Wales, that's still Diana. you're right though it is bad form to miss this on both Kate and Meghan. and there i done it again, reverence of Royals is diminishing,
to be fair, if they did less publicity, it would be far easier to ignore them. with this series they'll feed the newspaper and internet gossip columns for months. probably just in time for the book, then series two late next year.
so if not for some privacy, what made the Prince give up his royal patronage and military associations? a change of scene i suppose, living the life of a royal in US, fame without the responsiblity, pursue a career in production and acting.