Create and connect the entities before opening the page.
I’d suggest going through the academy learnings as well if you run into these kind of issues: they’ll save you a lot of time! :)
You could do a datasource microflow and create your objects and set the relations. After that set the the dataviews at the page and connect the dataview with your microflow.
it turns out, when creating the merged entity, I cannot create fields for nested ones, but I can only choose from existing
It`s my microflow