I might have a slightly skewed point of view as a former math major…
I think that this might be okay, but it does make me nervous.
Selective universities like to see that you have challenged yourself. Also, some top schools such as (if I have this right) Harvard and Stanford do not admit by major. Admittedly they admit many students who are exceptional in one direction and less strong in another direction.
Another issue that I see is that there is always the possibility of changing majors. As an example, one daughter started university as a languages major and then changed to be a STEM major (specifically a biology major).
I know several lawyers. I just got off a call with a couple of them. One thing that I noticed: They are just as strong if not stronger at logic compared to the engineers that were on the same call. They just apply their use of logic to legal issues rather than engineering issues. Studying math forces a person to exercise their logical thinking skills.
And I think that this is true also.
Skipping math for a year may be entirely fine. It however makes me nervous.