Remote desktop, real and dummy monitor

You can use vnc if the connection is local.

It is possible to run Teamviewer on Manjaro.

I use it for remote support (commercial license) a few years back I tested a local connection to a Manjaro desktop - the result was not so great - never tested again.

I prefer vnc even if it is across internet - simply use a ssh tunnel.

This kind of setup is descrbed in several guides in the Tutorials section.

As you are new to this game - I recommend reading [root tip] [How To] Update Manjaro the smart way for pointers on how to apply maintenance to your system.

For your immediate topic - remote connection