So, if your Android can open a connection to the server, or if the problem goes away while on safe mode, this means that you have a bad third party app problem. To run your Galaxy Note10 to safe mode: ...

The “Unable to Establish a Connection With the Game Server” Error prevents you from joining both official game servers as well as community-made servers in CS2.

In some cases, “Couldn’t establish a secure connection” error can be caused by a temporary glitch within the browser. A quick restart of the app may fix it.