The ArcGIS Online Map Viewer has a filter tool. There is a widget for this ?

[Kevin_Useche]

Is an api widget or a custom widget ?

[LefterisKoumis]

There is one in Experience Builder.

https://developers.arcgis.com/experience-builder/guide/filter-widget/

It is based on this:

https://developers.arcgis.com/javascript/latest/query-filter/