The Wedding People is the number one beach book that stands out to me
Elin Hilderbrand is generally another solid choice for that kind of genre/mood
Liana Moriarty is another author with some good casual reads, my favorite of which was What Alice Forgot
Abby Jimenez has some fun rom coms that would be good for the beach (be sure to read them in order, she does a lot of sequels and it's helpful to do them sequentially)
Bill Konigsberg is an author I found because I like the narrator who does the audiobooks and I like the Bridge and Destination Unknown, both are basically smartly written teen dramas
Jonathan Tropper is excellent if you've never read him - very funny and easy to read
If you liked the Hunger Games I thought Sunrise on the Reaping was great (I liked it better than the Ballad of Songbirds and Snakes)
If you've never read Kevin Wilson, he's a pretty quirky author with some fun characters
Fredrik Backman is another author I love, and he has plenty of books including a trilogy
I love Stephen King so I'll recommend almost anything by him as well
For what it's worth, I've read all the books you liked so I think we have similar tastes but if you want ones closely tailored to that kind of book or some one offs of newer authors I've found I can add some more
Enjoy your vacation!