Wow, this is a fairly complicated layout! Which isn’t necessarily a bad thing, there’s all sorts of ways to achieve what you need. Here are just my personal thoughts/recommendations based on my own preferences.
I think the flow headings aren’t appearing because you changed something on pages that already had page overrides (for example, if you remove overrides from your page 3, flow headings reappear). Flow headings are designed to move automatically with the music, but page overrides tell Dorico not to change the frames on that page at all, not even if you update the underlying master page, and flow headings are technically frames. I also don’t think it’s possible to show flow headings automatically in layout frames, but I’ll double-check that. So I would probably recommend trying to use Dorico’s master pages, master page frame chains, and automatic flow headings as much as possible and leaving local page adjustments/overrides until the end if you can - particularly given the number of separate flows & flow headings it looks like you’ll be handling.
Here’s an amended example - I’ve edited the First and Default master pages in a duplicated master page set to be closer to what you had arrived at in your project, including editing the paragraph styles at that higher level rather than in individual text frames (which I can see you’d already started doing). I quite like to have master pages as a “base” at the very least, so if I later need to remove local page overrides for some reason, I don’t go all the way back to square 1.
I also put the “Section 1” etc info into fields in Project Info, so they’re “safe” in the project and can be called up using tokens - they’re in fields for the first flow in the section, so Flow 1 for section 1 and Flow 9 for section 2. I also changed the alignment of the page number paragraph style to “Left” - if you want consistent formatting on every page, that will stop it appearing on the right edge of text frames on odd pages, even if that text frame is in the top-left corner because you copied Left-Right when editing the master page. (We’ve all been there.) If you want the project title/page number to swap depending on which side they appear, just edit the text frames and paragraph style settings accordingly.
General tips: keep an eye on your frame chains, you had at least three available when it looks like a continuous stream of music, just separated with text frames for new sections? It’s probably easier to work with fewer frame chains. Also, avoid locking all 4 edge constraints on frames on master pages - if you then use that master page in a layout with different page margins, the frames can get distorted or pushed beyond the margins. Lastly, it’s not always that important, but be aware of the difference between “Current Page Only” and “From This Page Onwards” when inserting master page changes - in your project, you had two master page changes “From This Page Onwards” on two adjacent pages, when I suspect you maybe meant just those pages? For obvious reasons, this can have knock-on effects on subsequent pages.
Final Exam_LH.dorico.zip (480 KB)