In Power apps portal you can use entity list to display a set of records from Dataverse.If you want to create  the List in  Portals  follow the below steps:

Step-1:Goto Portal Management Application —> Click “+New” option.

The List form will be open,Then Enter your name, Table name,Website and view name.

• Name: Name of the portal list you want to use
• Table Name: Name of the table from which you want to display your view
• Website: Website you want to add this view.
• Views: Views you want to display to a user.

Now Save the List form.

Next open your portal in edit mode and go to the web page on which you want to show your list.

click on the section if you want to show your list and go to components in order to add  list.

Now select use existing and then select the list do you Want.

Now save and sync configuration and reload the  page. You will see the list like below page.