It’s apparent you did not bother to even look at the link I provided that contained a video showing a series of Russian combat flights over the Donbass?
And despite your stubborn belief and others that the Ukrainian air force is “stuck on the ground,” to the contrary, the Ukrainian air force has pretty much been decimated. The Ghost of Kyiv no longer exists.
A handful of flights is not air superiority. Look at our wars. No enemy of the USA can openly move about in daylight because we can destroy them from the air.
Ukraine has trains filled with artillery shells rumbling towards the front lines every day. Russia has no way of hitting targets like that currently.