Surely the complaint isn't that facebook/react-native switched out which action they're using though, but that the author of hramos/label-actions (presumably hramos) published his action to the marketplace, specifically under the name label-actions?

It seems to me that the connection to facebook/react-native is tenous at best. Even the connection to Facebook at all seems pretty weak; yes the engineer works at Facebook, but if this had been an official Facebook OSS project that they wanted to publish themselves, surely they would have done so under the facebook org?

It looks to me like this is just something an engineer at Facebook did as a side project.