How to display the checkbox for bulk actions?

[isaac_fln]

I saw this sample app and created an action in my app with the same characteristics, however since I started the application the checkbox to bulk actions never appeared.

https://www.appsheet.com/samples/One-way-to-apply-an-action-to-multiple-rows?appGuidString=da89e83b-...

I consulted some topics but none helped me to make it appear, this one for example considers that the box is already there

help.appsheet.com

Bulk Select

When you need to select more than one record at a time in your application

I am using a View deck and can add the action to the action bar, but the checkbox for bulk actions still does not appear.

Does anyone know how to make it appear?