(Almost) every Zigbee device on mains is a repeater/router, no need for dedicated repeaters. Make the mesh more dense, using smart bulbs or sockets and wait. The network will rearrange, but it can take several hours to even days.
You bought them already, but these have been proven to cause network stability issues. They black hole traffic from non tuya devices under certain circumstances.
But have an issue with it. If I bind a new device with it powered on, the device doesnt configure correctly.
In the image I bound devices 1 - 5 without the outlet powered.
I then powered the outlet and bound it.
Then I bound device 6 - it connected but isnt not working.