Max 3 to 5 meters is quite a normal signal range indoors.
But you probably don’t know they can extend the zigbee network?
https://support.homey.app/hc/en-us/articles/10374465562652-Creating-a-stable-Zigbee-network-with-Homey-Pro-Early-2023
Often interference shortens the usable range, or even cripples a zigbee mesh network.
Wifi 2.4GHz can interfere badly (including close neighbour’s wifi signals)
Make sure to set the channel to preferably 1, 6 or 11 and set the zigbee channel to a non- or low interfering one
Extended hints and tricks:
