On https://pro.arcgis.com/en/pro-app/latest/help/data/geocoding/find-places-on-the-map.htm the documentation describes:
"Locate configured features or records - In the Locate pane, you can configure layers or tables to search on specific fields. These settings are saved with your project and transferred to other parts of the system when you share as a package or a web map."
We want to save these settings also in Layers and Layer-Files, so that we can export and import layers to projects and maps without having to do a further configuration of the locator settings.