This scene was left deliberately ambiguous in English. You're meant to assume what Enkidoh said so what Moomba said doesn't just come out of left field like a bizarre and foundationless plot twist. It has nothing to do with the Binding Coil. The biggest clue is that, even though canonically everything happens in the patch it was released in, there is no contingency line that prevents him from saying that if you haven't done the Coils.
Come back to this after you beat Stormblood's base story arc.
What you're seeing is Zenos receiving word that they've located Shinryu, who is still in Omega's bindings. This is why Zenos immediately rushes out of Doma and has Yotsuyu kidnap Krile so he can copy her Echo onto himself with Aulus's Garelans-magicks machine.