Should I be able to publish a web map from Pro where the basemap (one of the ones at https://www.arcgis.com/home/group.html?id=4c790318395940c18a16e8acd721de25#!) has a coordinate system of WGS84 but the map frame has an equal earth projection?
I'm currently getting error 00230 because of the discrepancy.
Since the projection engine has been part of the JS API since 2018, I expected the people looking at the web map to use client-side (or the server-side geometry engine as a last resort) transformations the same way Pro projects things on the fly.
