While the Raptor Lake processors are to remain compatible with current Alder Lake motherboards, Intel will still release upgraded 700-series chipsets that could feature more PCIe 4.0 lanes and additional USB 3.2 Gen 2X2 ports.
https://www.notebookcheck.net/Intel-s-upcoming-Raptor-Lake-chipset-specs-may-have-been-sneaked-in-the-latest-PCH-update.605045.0.html
Just curious on your source for Raptor Lake being gen 13. I don't think this is correct and isn't present in Intel's marketing material from what I've seen. I believe Raptor Lake is still gen 12. Looks like a case of mass media assumption.