Help with Winkel Tripel map projection

[JoseBarrios1]

Hello everyone,

I'm working on creating several maps based on a reference map that uses the Winkel Tripel world projection. However, I'm running into an issue with distortion at the north and south poles. In the reference map, the poles extend neatly to the graticule boundary, but when I set up the same projection in ArcGIS Pro (Winkel Tripel (NGS-world), I see large gaps at both poles (see attached image). Does anyone know how to correct this? Any suggestions would be greatly appreciated!

Thank you!