Modules
Capabilities are modules, switched on one platform at a time.
A module is one capability — a thing a platform can do — that is switched on or off for that platform independently of every other platform.
Two consequences are worth stating plainly:
Switching a module on is a change to one platform. It does not touch anyone else's, and it is not a deploy.
Code asks whether a capability is enabled, by name, for the tenant it is serving. It never decides by comparing one tenant to another. That is the same rule as the tenant boundary itself, applied to features.
Which modules exist
The set moves, and the Console lists the modules a given platform can enable, with their current state. That list is the answer for your platform; this page deliberately does not print a catalogue or a count, because a number here would go stale silently and a reader would have no way to tell.