Hi Spencer,
The trial HCP accounts do not come with Fiori Cloud Edition Apps.It is in the trial landscape based in Europe. If you register for a Demo account in Fiori Cloud Edition, you would be given an account (in a non-trial landscape close to your region) which will have those 45 Apps you mentioned.
You could probably download the MyInbox Fiori App from Demo account and import in your HCP Trial account and setup your HCP-ODP Provisioning within your HCP Trial.
Cheers,
Murali