Hello Everyone !
Wheather you like it or not, maybe I just should throw out one feature to add this to the ArcGIS Pro.
It is about the coordinate systems. I am aware that there is a way for you to open each layer and check their coordinate system.
If you have many of them from different coordinate system, you have to open the the Map Propertis and
(See screenshot )

But how about add the similiar one and put it in the

Maybe in the future versions.