As I explained elsewhere in this post, I got to this installer page by clicking on "Check device compatibility" on the https://e.foundation/e-os/ page.
So I was actually expecting a device listing page, not a WebUSB program.
I'm writing this from a P14s Gen1 (AMD) and it works great on Fedora 35 and that includes the fingerprint reader. It obviously works great on Windows but I don't use that.