Given the reticence of the current administration, I have my doubts NATO SF are in country.
Russia can indeed do something about NATO involvement.....leave. : ) I can hope.
Whether or not NATO SF are in country is moot because it is a neither confirm nor deny situation.
Anyway the Russians have other problems to concern them at the moment. Ukrainian partisans are active in Russian occupied parts of Ukraine and besides attacking Russian military targets and personnel, they have taken to eliminating Ukrainians who are Russian sympathisers or willingly work for the Russians.
Ukrainian partisans target Russian sympathizers as war grinds on (taskandpurpose.com) There are always collaborators in enemy occupied areas during a war and they are traitors who deserve what they get. During WW2 Soviet partisans who operated in the same area, were very forthright with their treatment of Nazi collaborators.
Apparently the VVS has lost a SU-34 Fallback to friendly fire over Luhansk.
Ukraine Situation Report: Russia Appears To Shoot Down Its Own Su-34 Strike Fighter (thedrive.com) Unfortunately this happens during wartime, but this one appears to have been a rare bird.
The Ukrainians have captured a Russian T-80BVM tank and here are taking it for a test drive. According to them they have 11 of the type in various stages of disrepair.
There are claims that Russia is using a captured nuclear power plant as a military base. The Ukrainians claim that the Russians have artillery and missile batteries based there and are using them to fire on Ukrainian targets. The Ukrainians cannot retaliate because of the nuclear power plant and the radioactive hazard.
There is a call from Ukraine for Russia to be declared a terrorist state. I have a problem with this because there are far to many instances in history of deliberate shelling and bombing of civilian areas by combatants. If you declare Russia a terrorist state because of this, then a precedent is set and theoretically that could be applied retroactively meaning that many countries including UK, US, France, Germany, PRC, Italy Japan etc., could be classified as terrorist states as well.
There is a claim by the UK CDF that the Russian Army is having morale problems amongst its soldiers.