Continue to liberate territories from an occupying force, including Crimea?

It looks like you think this is just a provocation, when it's not - Crimea was one of the gateways for supplies to support the invasion.

But I see what you're saying, you just need to flip it: what else can Russia do (after the invasion, indiscriminate destruction, mobilization, destruction of civilian infrastructures).

Why would they want to do anything else to the bridge, apart from destroying it a bit more completely? The goal of this action is to hinder Russian military supplies to Crimea. Obviously they are going to attack other Russian military targets.

Video of the damage: https://twitter.com/JimmySecUK/status/1578639387843526656

I don't think he meant it's the beginning of what they intend to do to the bridge. I mean the rail connection looks like it could be salvaged so they might take another crack at it, but it's more likely that he meant it's the beginning of the next phase (the end?).

It means that Russia will have to move it's war material to Crimea by boat