LARA R6 - No Network Stack Over USB

In the uBlox Application Development App Note, it states:

“Section 4.4: LARA-R6 “00B” product version does not support network connectivity modes over USB.”

Does anyone know if this is a temporary issue or a fact of the R6 that network stack is not supported by Sparkfun selection of chips. Does anyone know if the L6 has the same issue?

Our version uses the 6401 with no additional suffixes LARA-R6 series | u-blox, and the L6 integration manual says
“Ethernet-over-USB (LARA-R6 series “01B” product version and LARA-L6 series modules only)”
on pg 35