Xiaomi AX1800 Router: Possible low-cost Wi-Fi 6 entry?
GitHub - Baumgartl/openwrt-xiaomi-mir3: OpenWrt with support for the Xiaomi Mi WiFi Router 3 a/k/a MIR3. Based on current stable release v18.06.2 with Linux Kernel 4.14.95.
Xiaomi Mi Router 4A Gigabit Edition (R4AG/R4A Gigabit) -- fully supported and flashable with OpenWRTInvasion - For Developers - OpenWrt Forum
OpenWrt Wiki] Xiaomi Mi Router 4A Gigabit Edition
OpenWRT firmware flashing in Mi 4A Gigabit WiFi Router - Lazy Tourer