Agreed. Have heard some 'experts' asked about the map you often see on news sites, with the differently-colored cross-hatched areas and such, commenting that while they may have forces in those areas, the areas themselves are misleading; they don't actually 'control' all that area. It is a more a case of positioning firepower to be able to shell things inside the area, especially UKR military vehicles. That proximity works both ways.Not a military expert, but I think this threatened encirclement of Ukraine’s eastern forces is a fantasy of guys who draw red lines on maps more than an urgent reality.
As we have seen in countless recent conflicts, because you have driven twenty miles down a highway doesn’t come close to meaning you control all the territory between that highway and the next well enough to deny passage of the enemy. Hell, it doesn’t even mean that you control all twenty miles you’ve driven down.
The Russian army that cannot encircle Kyiv less than 100 miles from the Russian border cannot conduct an encirclement of hundreds of square miles in central Ukraine in any real way. At least not in the short-medium term.