Sun reflection question.

Hello, can you please check the image, is there a way to adjust the reflection size on the water?
Currently, it looks thinner than the sun.

I really appreciate any help you can provide.

 

There's nothing built in to Unity, no. You'd need to either switch to using the HDRP, which supports the concept of light radius & angle size, or use a custom water surface shader that treats the main directional light as having a size, writing your own specular lighting code to handle that.