Power apps portal:

If you want to add Filter in Entity List for to filter records in PowerApps Portal follow the below steps:

1.Go to Portal management app.

2.Open the list on which you want to add the filter option.

3.Next, Scroll down and go to Enable Metadata Filter in General tab.

If searches for matching text in the selected column of the table.

• Click on “+Text filter” option for to add the filter.

Next, Select the attribute name for which you want to filter and Display the list name.

4.Click Save the form.

Now save and sync configuration and reload the Portal  page.

It Look’s like the below page.

Hope this Helpful!