When running the Create Locator tool, the Field Mapping parameter lists field aliases, whereas the Field Mapping parameter in the Locator Properties dialog box lists field names.
This issue is not reproducible in ArcGIS Pro 3.4. Other ways of sharing the locator building process across multiple environments include building locators using Python or sharing the previously run Create Locator tool from the history as a geoprocessing package and using it in another environment. Refer to https://pro.arcgis.com/en/pro-app/latest/help/analysis/geoprocessing/share-analysis/create-a-geoprocessing-package.htm and https://pro.arcgis.com/en/pro-app/latest/help/analysis/geoprocessing/share-analysis/use-a-geoprocessing-package.htm for more information.