If certain hidden assets were exposed in order to blow up some Russian pipelines underwater, would not an underwater hunt be on now by the Russians and their allies for those hidden assets?

Flip the script.

In the book/film The Hunt For Red October, the Russians were both the good guys and the bad guys. You had a rogue Russian sub trying to defect while the other Russian sub desperately tried to sink it before contact with the Americans could be achieved.

No, Russia did not blow up their own pipeline. The 'missing' Russian nuclear sub is now part of the hunt for the assets that blew up the pipeline. The asset/s that accomplished that destructive mission was likely 1 or more submarines. Whatever it was, it did not operate on the surface of the ocean.

The 'hunters' of the Nordstream pipelines are now the 'hunted'.

There's a massive hunt underway underneath the surface of the ocean to find and take down whoever committed this act of war against the Russian Federation.

You're already watching Red October unfold, but nobody is really explaining to you what's going on.