بسم الله الرحمن الرحيم
In the abovementioned case if you read اللهم صل على محمد from durood Ibrahimi then sajdah sahv was necessary on you, and in case of reading durood more than it or complete durood sajdah sahv shall of course be wajib.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.