You won't be able to see the Schema until you give yourself the _SYS_REPO SQL privileges on this schema as said by Thomas:
When you create catalog objects via the repository, it is the user _SYS_REPO who activates and owns these objects. By default no other user will automatically have visibility or access to these runtime objects. Therefore you must always create a role via .hdbrole to have access to these objects. Only _SYS_REPO can grant access to them. Therefore you need a role which was created by _SYS_REPO in order to access them. The repository role conception also creates a role which via _SYS_REPO.