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Wavy shading on normal maps when changing roughness value

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Hi,

I hope everyone is fine, I have been learning to use SP to bake normal maps from  high poly to low poly meshes, I thought I was doing the process right, since my normal maps seem to be fine after baking, however when I increase the roughness, what I think is the normal map starts showing shading artifacts, some kind of Waviness becomes very noticeable, I am more than happy to attach images showing what happens here.

Here is my mesh with a roughness value of about 0.5


This is what happens when the roughness is near to 0.0


I think it is also important to share the normal map generated after baking
UVs

And here is the object displaying soft and hard edges (soft are the dotted line and hard the regular line)


Having no more to say but thx to whoever may know whats going on, I hope you all have a great day.

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