reference grid centroid labels

[IceCreamBean]

Is there a way to label the centre of the new reference grids with the grids name? as below.

If no way to directly label, any method of turning the grid into a attributed polygon layer I can label in the map view?

[AndrewBarker3]

Consider using the Grid Index Features geoprocessing tool instead.  I get the feeling the reference grid you are using is simply a graphical aid, so isn't meant to be turned to a polygon that can be labelled.  Grid Index features are the polygon equivalent.  

https://pro.arcgis.com/en/pro-app/tool-reference/cartography/grid-index-features.htm