I want to know that was the river Brahmaputra created by Lord Brahma or any other God?
No, the Brahmaputra river was not created by Brahma.
It was actually created by Parashuram.
Parashuram, after beheading his mother, found his axe sticking to his palm because he had committed a sin.
To relive the sin, he went to several places, but without any success.
Finally, he went to Manasarovar, where he could relieve himself of the sin.
He then decided to make way for the water in the sarovar to go to various places on the earth as a river. The river is Brahmaputra.