I know a lot of screenwriting advice leans on the concept of acts -- but those aren't the same thing as chapters, let alone paragraphs. And a lot of novel-writing advice talks about acts, too, and definitely about beats (especially in genres like romance), and sometimes chapters, but it's vanishingly rare for it to really address something like paragraph structure.

(Jonathan Kellerman, who writes that wildly popular long-running Alex Delaware series, sometimes almost lapses into sentence fragments. So does Stephen King.)

Sentence fragments are great, when used right! One of the things I always tell my younger writing students is that while they should definitely pay attention to the grammar rules they're learning in school, for fiction, you often can and should break those rules for effect.