The error is ‘Missing value for match criteria’ with exec command contents.
Same config works in VS Code SSH Extension
Match Host MyServer exec “! grep Home ~/.wifi_loc/current”
JumpHost my-home-jump-host
When this error occurs it completely breaks config parsing so even hosts that don’t have Match directive don’t show up and you can’t manually connect to a host either. The workaround is to rewrite the config without Match/exec syntax and specify it as alternate ssh config in settings. Of course, then the IDE history for the host would be split between local and remote connections.