You can not say that "something" comes to existence before math. By other words, at some moment in time objects appear and only few seconds later (or few billion years later) those objects gained ability to be labeled (or counted).

As soon as anything "appear" it ALREADY is mathematical object - it can be labeled as "1" or "yes", or you may call it "existing", objects can be added (if more than one object can be counted), multiplied, etc.

Now, remember that you still can even label non-existing yet objects (as "no" or "0" or "does-not exist", etc.). Therefore, you have mathematical labeling system "on place" even BEFORE any object come across.

So, by your logic math indeed exists BEFORE anything else comes to existence, and from this point of view is MORE FUNDAMENTAL than universes or any other "stuff".

But I feel that word like "before" is not accurate word here because math may describe objects existing without time or without space.

"More fundamental" probably is better. Math indeed is more fundamental than anything wich has property "to exist".