RGB Matrix on second instance

Trying to use this, node-red-contrib-easybotics-led-matrix.
My HA and NodeRed setup is on my server but this matrix will be on a pi on it's own, this node expects the Matrix to be local so I am trying ot figure out how I go about setting this up.
Is there a way to have two NodeRed instances connected (I assumed something with MQTT) that will allow me to continue to use my main NodeRed instance to control the instance on my Pi.
Hopefully that makes sense.

That is certainly how I do it, using MQTT to communicate between them.

If you want to learn more about MQTT then see this tutorial MQTT Essentials - All Core Concepts Explained

Hm, ok that's what I figured. I might just setup some flows on that instance that have MQTT in them so I don't have to touch them ever again.
I was hoping I could manage both instances from a single UI.

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