VNC viewers not working

I have a Samsung Galaxy A10s with Android 11 One UI 3. Recently there was a problem: VNC viewers do not work. I enter, for example, localhost:1 (I want to connect to the Termux VNC server), I connect, and the connection window hangs indefinitely, and then a timeout appears. And so with any VNC viewers (I tried AVNC, bVNC, VNC Viewer). Help me please! > Translated by Google Translate from Russian