Note that the ConBee 2 is old and does technically not even support Zigbee 3.0 (though can use Zigbee 3.0 devices in backwards compatible mode) and is does not have very good reception so there is many others reasons to upgrade.
Still recommend buying both a powered USB 2.0 hub and a newer Zigbee Coordinator adapter like example ITead’s “Sonoff Zigbee 3.0 USB Dongle Plus” (model “ZBDongle-P”) based on Texas Instruments CC2652P) → ITead's "Sonoff Zigbee 3.0 USB Dongle Plus" (model "ZBDongle-P") based on Texas Instruments CC2652P +20dBm radio SoC/MCU
See the many many reasons why here → Zigbee networks: how to guide for avoiding interference and optimize for getting better range + coverage