بسم الله الرحمن الرحيم
We are ordered to make hurry in preparing, shrouding and burying a dead. When Janazah is present then janazah salah should be offered immediately and the body should be buried. If one wants to tell any necessary ruling then there is no harm in telling it briefly. But it is not suitable to stop the janazah and address the gathering for about 10 to 15 minutes.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.