It's under the get support column at the bottom of any product page .
 
To the Moon !
 
 

Sorry, was half asleep, and didn't adequately read your post .  EVGA's compatibility lists aren't very extensive, so, no suggestion ...
other than use an external WIFI router .  You have two very good NICs that are already set up to do just that . 
I have the same Z370 board, and use a separate modem ( ARRIS SB8200, compatible with my ISP ), and a separate WIFI router ( NETGEAR N600 ) . 
Works great, plus I can wire network another computer, or four to it .
 
I tried the modem straight in, modern, high speed cable modem, long boring story; anyways the speed difference, with/without my older WIFI router
was negligible and not humanly noticeable .  A brand-new router would probably be no difference at all, plus you'd get the AC and 802.11 AX you want .
On sale, www.amazon.com/NETGEAR-Nighthawk-5-Stream-Router-RAX30/dp/B09BK8PM1M?th=1, and easy to set up :)
Plus, does not use-up PCIe lanes .
 
To the Moon !
 
 

Wow, that's very interesting, but way too complicated for me .  Though I did accidentally find this pdf on some ways to do what I think you're doing .
How-To-Connect-a-Computer-To-a-Mobile-Hotspot.pdf (pcpl21.org)
 
To the Moon
 

Very neat !