profile page and account page

Hi, I have issues in showing certain fields in both the user profile page and in account page.

User profile page :

This page is created by insert the profile form shortcode. When creating the profile form, I included the username and email fields in it. But I can not see these two fields in the form preview, nor in the frontend page. How to fix it?

Account page :

This page is created using the account shortcode. Under the account tab, there are only limited fields displayed. I wish to add more fields to it to display in frontend page. How to do it?

Thanks for all help.