After what happened with the Minsk Agreements, Russia doesn’t trust Europe at all. From Andrew Korybko at korybko.substack.com:

Russia can expect nothing in return from the EU if Putin concedes to allow their troops and aircraft to deploy in and patrol over Western Ukraine.
Russia has long warned that any unconditional ceasefire in Ukraine of the 30-day sort that Zelensky has proposed could create an opening for NATO to expand its military influence in that country. Hitherto dismissed as a conspiracy theory by the West, Radio Liberty just let the cat out of the bag. The unnamed officials who they cited in their recent article confirmed that they envisage this “buy[ing] the Europeans time to assemble a ‘reassurance force’ in the Western part of Ukraine” and organize “air patrols” there.
Their reported game plan is “keeping the Americans onboard” the peace process, “sequencing” the conflict by clinching a ceasefire that’ll later lead to a lasting peace, and using the aforesaid interim period to carry out the abovementioned military moves for pressuring Russia into more concessions. What’s omitted from Radio Liberty’s article is that Russia has threatened to target Western troops in Ukraine, who Secretary of Defense Pete Hegseth earlier said wouldn’t enjoy Article 5 guarantees from the US.
Even if Putin agrees to this concession that’s assessed to be among one of the five significant differences between him and Trump that prompted Trump’s angry post against Putin, Radio Liberty reported that this still wouldn’t lead to de jure European recognition of Russia’s territorial gains. The same goes for them lifting sanctions or returning any of its €200 billion of seized assets. More sanctions might even soon be imposed and the windfall profits from those assets will “bankroll Ukraine’s military needs”.