see my friend here a form with 3 entities
that how my domain model look like
and that is how your microflow should look like
I hope this may help you
Exactly as Stella mentioned,
a note I would like to add is to keep your associated fields grouped and have a nice list of dataviews with the fields within that and use some headers to guide your users through the process.
Hi UMMADISETTY SHARATHKUMAR,
Call the form page using microflow.
In that microflow , create object for the associated entities and associate those entities with main entity and then call the page.
It will work.
Note : Your fields are shown as read only because, it doesnot find an object to show them as editable.