Most routers can be configured to act only as a bridge and WiFi access point, but that requires some mucking about in their configuration menus. It's not hard (I've done it with my old Actiontec rev I) and is a good idea if you already have an old router lying around and don't mind playing with router configs.
CAN I HAVE TWO ROUTERS IN MY HOUSE? | Yahoo Answers Apr 09, 2009 Can i have two routers connected to one modem Dec 12, 2016
Two routers in Nighthawk app - NETGEAR Communities
Solved: I have two arlo systems with the two routers. Can
Jul 24, 2020
Will hooking up two or more routers speed up my internet? Routers are merely boxes that broadcast your internet signal over a certain distance so that multiple computers can connect to your network. 2. Routers provide access to the internet: In certain Two Routers - Verizon Fios Community