Though I feel the Belarusian’s are a bit more savvy and realise they are being sold an election pup, probably hence the reluctance of the Country to get involved in active participation as I feel there would be a mass revolt and Lukashenko’s position would be tenuous.
It shows in the fact that Belarusians are fighting for Ukraine and the railway workers were sabotaging the rail system to prevent Russian reinforcements.
A formal declaration of war means mobilisation and conscription I think