Knowing many Russians personally, I can tell you the mood amongst the public there was completely calm. They almost had an air of nonchalance about the whole thing.
I'm one hundred percent certain these actions will not go unpunished, but, Russia have also used this to their advantage as Wagner/their extended arm of influence now, with reason, sits ever closer to NATO in Belarus.
Attacks into Northern Ukraine can also be launched from Belarus, making counter offensives difficult from Ukraine as they wouldn't want to actively be seen to attack Belarus.
It's also not reported in the west the extend of which Ukraine is actively bombing the Donbass, and thus it's own people. Despite their officials denying it, this is the "counter offensives" you hear of.
The whole situation is a mess and it's increasingly difficult for the big powers to play smoke and mirrors with the general population because of the internet and communication being so much more available. My fear is because of this more and more drastic actions will be taken to make simple goals elaborate and multi layered.