I was looking for this in Alhora:
similar to how the themes automatically include their own, a small icon that I could insert to break up lengthy paragraphs without having to start a new chapter.
What outcome would make this useful?
From the Alhora team
Yes, you can do this with a Scene break, without creating a new chapter.
In Prose, place your cursor in the paragraph before the break and choose Insert scene break from the toolbar. On smaller windows, it may be under More formatting. In Blocks, choose + → Scene break.
To choose the decorative icon in the installed app, open Style Studio → Customise this style → Scene breaks → Ornament. If you cannot find those controls, let us know your device and Alhora version so we can point you to the right place.
Shipped in v1.0.0