In ArcGIS Pro symbology, there is the option to add optional suffix from a drop-down menu (i.e. dms, dd, ra). This is at times a nice time-saving feature instead of writing these individually. However, individual customization is still necessary for other suffixes - in my case power related (volt - V, kV, MW, kWh, etc).
It would be nice if the suffix labels option was entirely customizable.
