There was already unverified info that this is why the Moskva was struck
Or rather what gave the Ukrainians such an opportunity
It moved into position to try and see where Ukrainian aircraft are flying out from with its radars. Turned out to be Romania.
Now this is unverified, could even call it a rumor.
But it makes a lot of sense. All Ukrainian airbases have long been bombed and taken out of commission. Maybe with the exception of Uzhgorod, but that's very far away from the fighting.
It's very hazardous to store much less operate planes from Ukrainian airbases.
Yet every few days we hear from the Russian MoD report that a Ukrainian Su-27, Mig-29, Su-25 or Su-24 has been shot down
On Colonelcassad they just reported the death of a mercenary pilot. The Ukrainian Air force looks suicidal, but nevertheless still active.
About the rest of the Intel means - it's a lot more conditional than radar. Aircraft can be hidden from satellite detection, with it being known when spy satellites pass over the location in any case. Airbase perimeters can be restricted access to, much as the Polish border for several KMs in was restricted access to for journalists and others during the migrant crisis with Belarus.
As for the public pronouncements of NATO about not doing this, or that, or supplying this but not supplying that - it all means rather nothing. It is war and disinformation is the default.
NATO has gone all in on the Ukraine and will do everything it calculates it can get away with.