It could be a non-story, to divert attention from Ukraine. So I paid it only passing attention.
So far as I understand it. There is an embargo of certain goods
from Russia, as well as
an embargo on selling certain goods
to Russia. It changes frequently, as new items are added,
so I don't know the exact ins and outs. See what I did there?
The port is important and is the base for Russia's Baltic Fleet. It probably has more then it's share
of all kinds of missiles, air and ground assets also. Russia invited the EU to take over Kaliningrad because of
the expense of supporting it, several times since 1990. The EU always refused because it didn't want a few million Russians to 'suddenly appear' within the EU.
Kaliningrad is of more strategic value now, if Sweden and Finland join NATO. If it didn't have a substantial naval presence, the Baltic would be NATO controlled.
I believe goods imported through Kaliningrad are allowed to be 'exported' to Russia across Lithuania without hindrance. No doubt with some restrictions. Arms, etc. This is what the Russians are unhappy about. On the face of it.
As usual with the Russians though. There is the game you see. And the game(s) you don't see. Nothing is ever straightforward.
If the Russians decide to move against NATO countries, it will be to seize a corridor along the roughly 30kms border between Poland and Lithuania. Calculating that NATO won't go to war for less than a few hundred square kms of land, that without the rail link, most of the public might think is of little importance.
But such a move would cut off the link by land of the Baltic States from the rest of NATO.
If this is going to happen, there will have to be movement of significant numbers of troops
to the north west of Belarus. Which is where NATO satellites will be focused, until the situation with Russia cools.
So, based on recent experiences. If such troop movements are seen. They'll be reported in the press.
Personally, at that point, I would be going to the supermarket and stocking up with everything I might need,
if all services in the country were to stop, for whatever reason.
Because if Russia were to attempt to grab another land corridor. This time in two NATO countries. NATO will have no option but to respond in kind.