> Network printers from 2016 almost certainly (always in my
> experience) do ship with IPP-over-USB. For some reason USB-only
> devices generally do not provide it; it's very hit-and-miss.
IPP-over-USB basically requires the whole traditional networking stack,
so it's no surprise that it's usually present in printers that include
a network interface (very little extra cost) and not in
USB-only printers.
Stefan