While I'm not openly advocating hitting the convoys for as
@tsubaki mentions there must be a sign of faith, I do feel that Ukraine must monitor it carefully.
The Russians have already stated it's not a ceasefire and are only 'reducing' attacks near Kyiv, while the Donbas has not been mentioned.
If they do reposition troops towards the south, the Ukraine and NATO et al. need to decide if that's a suitable condition or compromise otherwise it's a bad play.
Right now, Russia's forces are stuck around parts of the country with depleted rations, air cover and morale; if they concentrate, they may be more effective.
No. They're moving troops back (err... retreating) in 'good faith' from around Kyiv and 'reducing' action. But, that's not in the east and south of the country.