Multible Lidl Zigbee Gateway SGWZ1A1

Hello togehter,

i use the Lidl Zigbee Gateway SGWZ1A1 as Zigbee gateway: Hacking the Silvercrest (Lidl) Smart Home Gateway - PaulBanks.Org

Now i try to add an second SGWZ1A1 Gateway, because i have no wireless connectionen between the floors.
But the Zigbee Configuration say only one Gateway possible.
How can i add the second Gateway into the Network? I also try with the original firmware to pair the second gateway to the first Gateway, but this doesn’t work.
Has anyone an idea?
Kind regards Toni

If you are using ZHA, that is correct. But you can use Zigbee2MQTT for the second gateway.

You can’t. It is a coordinator, not a router. And I don’t think there is router firmware available for this gateway.