With regard to the Russian/Ukraine conflict, I don't see any changes to the beacons, all the regulars are there, only propagation seems to be the change as we progress to the Summer pattern in Australia.
I would imagine that the beacons assist commercial fishing and merchant ships in their respective regions and not exclusive to the military. The military would have more high tech systems that would no doubt relegate the beacons way down the list of military importance.
Regarding Teotwaki, yes the 8MHz and 7MHz transmissions of "K" are in sync, I use a dual receiver this way in two radios and have observed this.