Set default math font within rust / custom world

[Roba1993]

I'm using typst as library for an own project and use a custom world with custom fonts.
With the following rust code I can set the new default font's:

 lib.styles.set(TextElem::set_font(FontList(vec![
            FontFamily::new("poppins"),
            FontFamily::new("fira math"),
            FontFamily::new("noto emoji"),
        ])));

But I'm not able to set the font for math. Is there any way to archive this?