Belkin Official Support - Setting Up a Wireless Bridge Between your Wireless Router and a Secondary Access Point
Wireless-to-Ethernet network bridging
networking - Expanding wireless coverage: What are the differences between LAN to LAN and LAN to WAN when it comes to connecting two wireless routers? - Super User
Amazon.com: GL.iNet GL-AR300M16-Ext Portable Mini Travel Wireless Pocket Router - WiFi Router/Access Point/Extender/WDS | OpenWrt | 2 x Ethernet Ports | OpenVPN/Wireguard VPN | USB 2.0 Port : Electronics
Linksys Official Support - What is a wireless bridge and how to use it
How to Connect Two Routers (with Pictures) - wikiHow