I know at one point there was one. If not on this server another but really I think it'd be a great way to get people to try it. If somehow it was playable from the phone slightly could give an incentive for new players.
I might be miustaken, but I do believe that this is the only version of RSC that supports mobile play? It is Android only, unless you have a jailbroken Apple device. There is a link on the website for the Android client. For 99% of my game time, I play on mobile, it's fairly easy if you have a phone with a screen similar to that of a Samsung S10+ or greater.