What is not available
Every product has a shape people expect it to have, and this is where this one differs from that shape. Nothing here is coming in a particular release; it is simply not offered today.
The page exists so you can plan around it rather than spending an afternoon looking for a switch.
#Not available
Only the old app key is kept, for upgrade purposes; none of that code is part of the shipping app.
It was tried and deliberately removed because it added an extra call, a smaller size ceiling, and a permission pre-check that wrongly blocked draft pages. All fetching now happens in the reader's browser or via the URL proxy.
A streaming PDF proxy with a 20 MB ceiling. The code exists but nothing calls it, and no route exposes it. Linked PDFs still go through the buffered 2.5 MB proxy, so 20 MB must not be documented as a limit.
Customer-managed egress domains for the standalone PDF app. The feature exists but is enabled only for the markdown, formatting, diagrams and Suite apps.
Confluence page-export rendering for the macro.
Confluence custom content modules (Capable Custom Content / Shared Storage) in the standalone PDF app.
Suite inclusion of the other acquired embed apps. A development file referenced for that purpose does not exist in the repository; only PDF Embed is actually composed into the Suite.
The choice corresponds to no code path.
None of this is a bug to report. If one of them blocks you, tell us: customer demand is what moves them.
#A few things worth knowing
If one of these is the reason you are evaluating the product, say so before you buy rather than after.
The list changes with each release, so check the release notes before assuming it still applies.
Where the app's own wording differs from this page, believe the app.
#Related
Better to know now than hunt for a switch.
