You can use the List view controls widget from Appstore. https://appstore.home.mendix.com/link/app/105694/
List view controls offers a set of widgets that allow you to build beautiful lists and grid, and among them you can use the
Text box search widget – Search box that can be used to search in multiple attributes or filter on a single attribute.
I am not aware of your specific context, but you could also swith to a data grid or template grid instead.