You don't need a 4G/5G router. Use an extendable ASUS router instead
ASUS Router 5GHz Not Showing Up? - Fixed Missing 5G on AX55! - YouTube
Asus RT-AC68U Review: Speedy and Secure 5G Wi-Fi
Asus Router Wifi 5ghz Ac3100 Gigabit Router Dual Frequency 2.4g 5g Wireless Router 5g Wifi Repeater With 8*6dbi High Gain Antenn - Routers - AliExpress
RT-AX86 Series(RT-AX86U/RT-AX86S)
ASUS ROG Rapture GT-AX6000 Dual-Band WiFi 6 (802.11ax) Gaming Router, Dual 2.5G ports, enhanced hardware, WAN aggregation, VPN Fusion, Triple-Level Game Acceleration, free network security and AiMesh - Walmart.com