Mirror sonar screen

Hello all...new member and first time thread starter so be kind as this is likely a dumb question.

Understanding that there will be environmental issues, is it possible and has anyone ever mirrored their sonar screen to a larger monitor on their boat?  I know there are waterproof monitors that are crazy expensive but I recently saw a $150, 16” portable monitor with HDMI and video ports that had an iPad type cover for protection when not in use.

Ultimately I guess my question is would it be possible to have 2 total sonars (1 front; 1 back), 2 monitors (1 front; 1 back), and mirror the monitors to the opposite sonar (rear sonar mirrored to front monitor and vice versa) so that you are getting the viewing equivalent of 2 sonars at both front and back while only having 1 sonar installed at each location?

This is probably as clear as mud.