And here's the submarine in Novorossiysk, which, as the Ukrainians claim, they destroyed.

Its integrity is confirmed by information from the scene, satellite images, as well as a demonstration directly on the spot.

Adding more info found:

The Western press is publishing satellite images of a pier in Novorossiysk, where an attempt to attack a Russian submarine with an underwater drone took place yesterday.

Although not very clearly, it can be seen that there is indeed damage to the pier on the left in the corner, and the submarine itself remained in a surface position.

As I wrote yesterday, my comrades from there reported that the submarine itself did not receive any damage, and the strike was directed at the pier. The Black Sea Fleet also reported that there were no damages.