It would be nice if Google could have implemented this in such a way that it would work with a combination of both Android and iPhone devices, and didn't rely on a handful of Google-specific apps.
It wouldn't surprise me if Google approached Apple and Apple chose to keep their garden walled. It also wouldn't surprise me if Apple copies this capability for iPhone-to-iPhone calls before eventually capitulating to a universal standard as they did with RCS.
My Pixel 10 has warned me twice now while speaking with recruiters that the call was suspicious. Both cases were false positives but it blew my mind that my phone could do this.