I have a power app with various fields and once filled they become the dynamic fields in an email flow. There are 2 emails that can be populated by a flow connected to the app. One email only needs the 3 fields on the left and the other email needs those same 3 fields and another 3 fields (on the right) that can be repeated (you press the add button as many times as you want) to populate a table that in another screen and it is put into the email by the flow. They are listed as they are added in the gallery on the right.

What I want to do is have a drop down with both email types on it (labelled below as letter type) and if the 1st email is picked (shown), only the 3 required fields on the left show and for the 2nd email, the six fields show and the ability to add fields to the table is revealed. There is a submit button and depending on which email type is in the drop down determines which flow it gets sent to.

I'm relatively new to power apps so could use some help!