That explosion is way too close to that sub for nothing to be damaged, it's practically on the waterline at the back of the sub. Especially in a enclosed harbour, the concussive force doesn't really have anywhere else to go.
That sub will absolutely have taken damage. The props are almost certainly toast, and there is likely to be stress damage to the rear especially.
However, the fact that it was tied up at port will help to mitigate some of the damage, since it’s when subs are underwater and pressurised that they are most susceptible to close by explosions due to the increased pressure differential.
It would by kinda funny if the Russians took the rear quarter of the kilo that eat that storm shadow and replace the rear of this sub to bring one fully functional kilo back online in record time.