In using the Zone Lookup App and it's not returning results on a layer in my web map which were brought in from the Living Atlas (Public Land Survey System). I have configured the labels and it works in my web map just not in the app. Are there certain layers that will not work with this app?
Unfortunately, there is a known issue with map service sublayers in Zone Lookup. To workaround the issue I suggest adding each layer from the service individually that you would like returned in the results. I haven't been able to reproduce an issue with labels, could you share specifics or report the issue to support.