Subnet Routes - How can I see my remote devices?

Newbie:

I’ve run the advertise-routes command in CLI however, I don’t know how to check if it worked? I have 2 devices on a remote network. Both hardware devices have their own Admin pages. All I want it to access their Admin pages via my office Mac. The remote router is a 4G router in a separate state so I’m trying to avoid logging into VNC all the time.

Any ideas on how I can troubleshoot this?