There are a few tips about ”known good” and ”known great” dedicated Zigbee Router devices here → Zigbee networks: how to guide for avoiding interference + optimize using Zigbee Router devices (repeaters/extenders) to get a stable mesh network with best possible range and coverage
As stated above, whatever you do, do not buy that Tuya Zigbee USB Range Extender / USB Dongle Signal Repeater (Tuya SKU: “RP280” / Zigbee ID: “TS0207”, which is also sold under different names/brands and models), as it will cause problems unless you only use Tuya devices, see warnings from ZHA/zigpy devwlopers here → Tuya Zigbee USB Range Extender / USB Dongle Signal Repeater (Tuya SKU: "RP280" / Zigbee ID: "TS0207") · zigpy/zigpy · Discussion #736 · GitHub