Pi3b+ with Meridian explorer 2 using tablet as screen

I will use ropieee to create a roon bridge on a Pi 3b+
Then I will connect the meridian explorer 2 to the USB as audio output
and…

I would like to use an old tablet android as screen to see what is playing

Is this possible (if yes how) or am I aiming at the sky?

The first part for sure. That’s the whole idea with RoPieee :wink:

About the tablet… that depends on what you exactly mean. For sure you can run the Roon application on your tablet and indeed see what’s playing. It’s not a dedicated screen however.