I've hung out on a writing forum where member-requested, mod-enforced OOC no-contact orders are an occasionally-invoked thing, and I think they're a mixed blessing. They're a shortcut for the extremely challenging process of dispute resolution, to be sure, but they leave the original dispute's bad feelings in place, curdling, with no way ever to be resolved. In the one case where one was requested against me, the other party basically left the forum shortly thereafter; if they'd still been active, and we'd each had to pay careful attention to avoiding each other's threads, and if we'd had any friends in common, I might have walked away rather than deal with the frustration.

Consider also how no-contact orders would interact with the Discord chat. I don't see that working very well.

As for IC-only no-contact orders, forgive my newbishness but what would be the point?