Is it possible to change the sun shape?

Thanks for replying so soon!
In the Sky Atmosphere editor, I couldn’t find any texture section properties.
Could you please highlight exactly where they are?
Even when I open the Sky Atmosphere material, I can’t quite locate the texture.
Or is there something that needs to be changed in the BP_Sky_Sphere window?

Also, I’m trying to make the sun appear larger(changing the source angle), but the reflection doesn’t match the source angle.
I saw a similar topic on the forum that suggests changing the sun’s size directly from the default engine sky blueprint, where the Sun Radius parameter is located.
However, even after changing that parameter, applying, and saving it, the reflection is still small.
Any leads?
Thank you !