Personally I'm glad Harry turned up for his fathers sake, walked in, left and went home. He could wear Dior or primark for all I care. He clearly wasn't warmly welcomed by many but what goes around, comes around.
What I think will happen to the couple is they will try multiple avenues to earn revenue, some more successful than others, but many will fail because meghans micromanaging amounts to bullying of staff. Harry has never had a job and frankly has no idea about the discipline a job entails. His book deal will stick to more positive hopes he has and will leave his family alone (fingers well and truly burned there along with the bridges) and won't be the big success the first was.
Meghans acting is done and over. She doesn't have the skills to be a director/producer (see above comments on micromanagement) so I think she will front up various woke/left wing/populist 'causes' and do well there.
Ultimately Harry has no organisational skills and relied on meghans Hollywood 'fame' (which was false) to fund this new life, and Meghan relied on Harry's connection to the RF for her fame.
Inexplicably they have both trashed that connection, and will eventually settle down into relative obscurity, struggling to maintain financial stability. A by product of the royal connection trash fest is a suspicion and dislike among much of Hollywood elite because they don't like people who sell their secrets (eg Courtney cox and her loo), so no red carpet and Hollywood feting for them.
Moral of the story, don't bite the hand that feeds you....or lie, gaslight, defame and hurt people who tried to give you everything you wanted.