Is there any way to test the transmit power and receive sensitivity of zigbee? Bluetooth uses DTM tools, what software and tools does zigbee use?
Transmit power and receive sensitivity will depend on the radio peripheral, not the protocol used. You can use the radio test example located under examples/peripheral/radio_test in the nRF5 SDK to test the radio peripheral: https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.0/nrf_radio_test_example.html
We also have a Benchmark application example for Zigbee you can use to test protocol related things like throughput, packet error rate, latency and CPU utilization in different scenarios.