Hm, some info on my project, showing and reporting the day-details per week:
Similarity: every day has to have an object available because it needs to show up. The difference: my project only needs one week at the time. The microflow sets up the entire week, regardless of the day having registered hours or not. This results in a helper which will be destroyed on page-leave.
Also, my project needs the calender-days showing 7 days per week, and in order to retrieve the EventChilds and show them per day, per week, the quickest way is to make the EventChild-entity also have a week number and an index on that attribute for optimized retrieval. Also, make the EventChild-entity have a day number. Then create the main helper on your page containing all objects, retrieved all at once. Loop over those objects and