Data Model

Good morning community, I approach with a doubt and curiosity with a topic that I did not get anywhere.

In the model view, we can create relationships with our data, the question is this:
-Could creating more than one data model alter the dashboard we create?

The doubt is because in my case, I must make a board of days of licenses in HR and tve to make a duplicate of tables because I have to calculate

- Licenses started

- Licenses Completed

When making the calendar, I had to duplicate the table and assign to a table the start date and another for the end date and be able to calculate both. But can you avoid what I did just by making another relationship with another page in the data model?

Thanks in advance