Hello - I am not sure what you mean but there is one grid setting and it applies everywhere - it is a global thing… do you want snapping on/off top be per layout, or the spacing, or both?
I find that frequently want the snap interval to be one thing for all model space views and another for all layouts.
For example, if i have a large object I could have the snaps in the model space set to 12". In the layout reduction I more commonly need snaps of 1/4".