Is there any option or way to know when Xbee3 module is synchronized with Digimesh cyclic sleep network?


I am working with Digimesh synchronous cyclic sleep.
My network has one gateway, it sets sleep and wake times for the network. And also receives data from the other nodes or let’s say sensor nodes within the network. On Sensor nodes, micropython application is running and it sends data once while wake up. So this is the basic task. After power up sensor node i want my sensor nodes to send data only after it synchronized with the gateway.

Now my problem is i could not find any option or way to check synchronization status in micropython. So the question is, Is there any way or option to know in micropython when node is synchronized with gateway?
Any help is appreciated.
Kind regards,