For Zigbee2MQTT you are best off posting issues and discussions to their community:
https://github.com/Koenkk/zigbee2mqtt/issues/
https://github.com/Koenkk/zigbee2mqtt/discussions
Note that it is recommend to instead use TI CC2652P based “Sonoff ZBDongle-P” instead of Silabs EFR32MG21 based “Sonoff ZBDongle-E” for Zigbee2MQTT.
Reason is that the ezsp adapter code in the zigbee-herdsman library which Zigbee2MQTT does not quite yet have feature-parity with its zstack adapter code, and most notable the ezsp adapter code is missing full backup and restore support → Koenkk/zigbee-herdsman#319 preventing restoring backups and migration → FAQ | Zigbee2MQTT
FYI, check out this thread for unofficial method on how to migrate from ZBDongle-E to ZBDongle-P for thoee using Zigbee2MQTT → Koenkk/zigbee2mqtt#16478
Tip is then to reflash the ZBDongle-E with Zigbee Router firmware to repurpose it as a dedicated Zigbee repeater/extender by powering it via a USB-charger in order to make it into a stand-alone product → https://sonoff.tech/wp-content/uploads/2022/11/SONOFF-Zigbee-3.0-USB-dongle-plus-firmware-flashing-.pdf
Note! Regardless of Zigbee gateway solution I highly recommend to read and follow all the tips here → Zigbee networks: how to guide for avoiding interference and optimize for getting better range + coverage
PS: If where to use Home Assistant’s ZHA integration then would instead recommend Silicon Labs over Texas Instruments based Zigbee Coordinator → Zigbee Home Automation - Home Assistant however that is primarly just because Home Assistant SkyConnect is based on Silabs EFR32MG21 → https://www.home-assistant.io/skyconnectDevice Quantity Connection Home Assistant Notes
SONOFF Zigbee 3.0 USB Dongle Plus-E 1 USB Zigbee2MQTT Used to control all Zigbee smart bulbs and Blinds. ZHA was becoming un-reliable for me so switched to Zigbee2MQTT