Whether the sun/moon is set to round, vanilla, or default, they'll always use the round reflection.

To Reproduce
-Set sun/moon to vanilla or default
-Look at its reflection in water

Expected behavior
Water should ideally reflect the sun/moon that you've set the sun/moon setting to.

Screenshots

Desktop (please complete the following information):

• NVidia
• Oculus for 1.20.1, mod version 1.7.0
• Shader version: for 1.20.1, release date 7/30/2024