Can't connect to Roon Core from Roon Remote

[BlackJack]

@Peter_Osterberg

clearly not enough to get passed the connection screen in the app

If this is the “Choose your Roon Core” screen, then read below:

Roon Remote on Samsung Tab A

This probaly helps you too: Additionally, if the above is not enough:

PS:

@Peter_Osterberg

Mentioning other subnets was clearly a mistake, it seems to have confused a lot. I mentioned it because it oddly worked better (I didnt expect any connection at all since this isn’t supported), and I only tried it because I was curious since correct network didnt work.

It is not uncommon that you can connect from a different network (if routing is allowed) but expected that playback doesn’t work. You’re not the first one who tried this.
As working playback is part of the Roon solution, this is one of the reasons why multiple-network-setups are not supported.