From what I've seen Unity (the client) can be ported to any device.
The launcher uses (Avalonia) which is cross-platform (Windows-Linux-MacOS), not sure about mobile though. Now that I think about it, I suppose there could be different ways to go about mobile and just avoid the launcher entirely.
The launcher uses (Avalonia) which is cross-platform (Windows-Linux-MacOS), not sure about mobile though. Now that I think about it, I suppose there could be different ways to go about mobile and just avoid the launcher entirely.