I mostly agree but they might only be issuing instructions to surrender in Russian in written (delivered by drone) or verbally. Ukraine made an extraordinary effort to capture a North Korean soldier and a special forces unit learned a tiny bit of Korean in order to communicate and capture one before the Korean could commit suicide.

The Russians that have successfully surrendered have claimed their officers will shoot their own soldiers for surrendering in view of them. In addition the Ukrainians have to treat anyone who doesn't follow directions as potential perfidy - fake surrenders - there's several videos of Russians pretending to surrender and continuing to fight when the Ukrainians get close.

One is pretty much screwed once they are sent to the frontlines on the Russian side.