There was Dragon ruby and rubymotion - but I think they are also defunct?
DragonRuby is not defunct and actively receives updates. It also sponsored several game jams. The last update, according to their Discord, was on January 25th 2024.
RubyMotion I can't really vouch for.
Dragonruby is actively developed and quite fun to work with, but I'm not sure it's the same thing.