I'm attempting to publish a web map to AGOL with ArcGIS Pro and have the map in NAD83 for offline use for data collection. When I go publish the map, it requires a base map but all provided base maps are in WGS84 which means that the map must be published in the coordinate system that matches.
A method I've been suggested is to take a single hosted feature class layer, open it in an AGOL map, add other feature hosted class layers to that map, and rename it
Am I missing a step?