I'm updating an old configurable app to a newer app. The older Compare app allows searching by address, but the Instant App does not. Our app compares FEMA flood zones from different years. The ability for staff and the public to search by address seems basic and would be very helpful. The alternative is to know the city well enough to zoom to any address or to use a second map to locate an address - a big ask.
In working on a different issue with the Compare app, an Esri tech checked this for me and concluded, "The Modify interactivity settings documentation shows the Search tool as not being supported in Compare. To utilize this tool, another template would have to be selected."
The Compare webpage says, "All Instant Apps templates include settings for a Home button and zoom controls, a legend, and the capability to search the map or data."
Also see the question AGOL 'Compare' App not showing Search tool. @BernSzukalski