Within Pro is the RSME reported in any locations in the software. Based on search of GeoNET posts I am not seeing it anywhere and I am also not seeing the reporting location in the software.
According to this article it should be returned, but I am not seeing it in any locations in georeferencing menus in pro.
https://pro.arcgis.com/en/pro-app/help/data/imagery/overview-of-georeferencing.htm
on the table or the ribbon.