Archer MR200 does not recognize Archer C7 as a repeater nor an extender. - Home Network Community
TP-Link AC1750 Universal Dual Band Range Extender, Broadband/Wi-Fi Extender, Wi-Fi Booster/Hotspot with 1 Gigabit Port and 3 External Antennas, Built-in Access Point Mode, UK Plug (RE450)
TP-Link AC750 Wifi Range Extender | Up to 750Mbps | Dual Band WiFi Extender, Repeater, Wifi Signal Booster, Access Point| Easy Set-Up | Extends Wifi to Smart Home & Alexa Devices (RE200) : Everything Else - Amazon.com