'Trapped' - is relative.

As long as Ukraine does not have enough artillery to keep the bridges (or what is left of these) under _constant_ barrage, the Russians in…

'Trapped' - is relative.

As long as Ukraine does not have enough artillery to keep the bridges (or what is left of these) under _constant_ barrage, the Russians in Kherson are not really 'cut off', and even less so 'trapped'.