As of version 4.4, you can add arbitrary folders to the Resource Browser to view templates from it. This is how you can add your templates saved in an OmniPresence folder. You can read more about this in the “Linking Template Folders on your Mac to OmniOutliner” section of https://support.omnigroup.com/documentation/omnioutliner/mac/4.5.2/en/using-the-resource-browser/
Due to sandboxing requirements, we must get your explicit permission to access locations outside of the app’s container so we can’t automatically pull in OmniPresence folders.