How to make a texture not shine so much

Is there any way to make a texture/material not shine so much? I’m trying to make a night scene with some moonlight (which is a directional light basically) but it’s providing a lot of sheen (or shine) on the ground and outside wooden floor (which is extended across the majority of the playable indoor map for reasons). So I’m just wondering if it’s possible to remove the sheen or glossiness (or whatever you’d call this) of a material like this one in the picture shown.
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Yes, either remove the specular node or turn down the glossy or both - in the material node editor.

Actually you can scale down the roughness value and keep the material not metal if it is.

Yepp.
In this case it might be a good effect to drive the rougness with one channel of the wood texture.
This way you have an interesting shinyness pattern instead of a uniform shine…

You could also set light min roughness to be high. But it seems that your floor has wrong roughness value so fix that first.

There’s a lot of nodes here in this grass material (Which is a different material from what I first showed) but I’m not sure which node would be the right one to edit/alter for in order to change the roughness.