It is hard to overstate how incredible it is that Ukraine is able to maintain a multiple day UAV campaign against the russian Baltic oil and gas terminals over a thousand km of russian and belarusian territory and apparently the kremlin can't do anything about it.
The nuclear sub and air bases at Murmansk and elsewhere on the Kola peninsula are another thousand km away, past nearly uninhabited territory. If the kremlin couldn't stop the campaign over busy southwestern russia, they sure won't be able to do it over karelia.