math, is it just physics?

We often hear claims that math has nothing to do with reality and is just something that exists in our imagination or some platonic realm of idealized forms.
For instance in the intro to this recent yt contribution:
https://www.youtube.com/watch?v=dzuDSTamzrE
On the other hand there seems to be mounting evidence that the patterns in physics match up in intriguing ways with abstractions on a conceptual level.
https://www.youtube.com/watch?v=-OxVsVUesSc
So in a way one could claim that concepts like integers and their properties and relationships can be more or less empirically observed in the behavior and properties of things like elementary particles such as electrons or fields.