In order to be able to access the H5P reports it is necessary some WS.

This WS should return the necessary data to display the results report in the official moodle app.

In this case, the data from the report export_to_template should work.

Check mod_scorm_get_scorm_access_information for reference.  And MDL-68449 for the other mobile WS on mod_h5pactivity