How is the compatibility of Nrf52840's zigbee with other manufactures?

Hi, I have 2 questions regarding Nrf52840's zigbee connectivity.

1. Is it compatible with ALL other chip manufacturers, or at least, what about TI? CC2530? Zigbee has a notorious reputation for running on the same stack but unable to communicate with each other just because the manufacturers are different.

2. Is there any good "getting started" tutorial? On nrf52840's zigbee?

Thank you!