Some modules lack a definition of a permission. In old times, listing a permission in permissionsRequired served as a definition.
But these days, all permissions should have an entry in permissionSets with a display name.
Attached is a listing of permissions that lack a definition. In some cases, the problem is not with the module, but rather the module that should define the permission.. Example: note.types.collection.get, which is mentioned for those modules where there's a referral to it.
The list of modules is SNAPSHOT as of today - March 1st 2022.