Hi,
Please look at the next community post.
As you can see, the SED https://community.nxp.com/message/1012968
So, if you look into the ZigBee PRO Stack User Guide ZPS_eAplAfUnicastAckDataReq
Once the sent data has reached the first hop node in the route to its destination, a ZPS_EVENT_APS_DATA_CONFIRM event will be generated on the local node.
You could read out the data that you received. PDUM_u16APduInstanceReadNBO.
Hope it helps,
Regards,
Mario