Linksys Official Support - Configuring the Wireless Repeater mode on most Linksys Smart Wi-Fi Routers
Linksys EA 7500 and the benefits of adding a range extender
Linksys Official Support - Configuring the Wireless Repeater mode on most Linksys Smart Wi-Fi Routers
Turn an old router into a repeater - Make:
Amazon.com: Linksys RE9000: AC3000 Tri-Band Wi-Fi Extender, Wireless Range Booster for Home, 4 Gigabit Ethernet Ports, Works with Any Wi-Fi Router (Black) : Everything Else
Amazon.com: Linksys WiFi Extender, WiFi 6 Range Booster, Dual-Band Booster, Internet Repeater, 2,000 Sq. ft Coverage, Speeds up to (AX1800) 1.8Gbps - RE7310 : Everything Else
Linksys Official Support - Setting the Linksys WAP300N to Wireless Bridge mode
Reuse an old router to bridge devices to your wireless network - CNET