I guess Jonathan was referring also to the abandoned WordPress Plugin. In the meantime Tumult (Daniel) picked it up and it works again.
Given using WordPress …it has API endpoints and if you want to go down that route and use WordPress as source for data look at https://developer.wordpress.org/rest-api/ and http://v2.wp-api.org/ and I also personally like atomic.js to handle ajax and loading with vanilla JS.
I once thought of making a “HypePress Theme” but then I never really needed it as I mainly use Hype with Wordpress in Widgetizes form in PageBuilders etc.
An GutenbergBlock would be nice though with the upcoming WordPress 5.0
Best regards