Not designs — structures. The pictures are yours; what a template decides is how many slides do what job, and what the words on them are doing.
Every template here is the same three-part shape that every account posting carousels seriously ends up using: a first slide that earns the swipe, a middle that repeats a pattern, and a last slide that asks for something. The difference between them is what that pattern is.
They fit however many photos you bring. The hook takes the first, the closer takes the last, and the middle cycles — so the same template works with four photos or 20, without leaving holes or running out.
Or start from a template above.