This is one of the key reasons why I advise streamers not to get too locked in to any third party app, be it for chat or anything else. The more heavily a streamer relies on such software the more likely it is that they will run into issues such as this where new tech isn’t support on their apps, or their apps are slow/unable to adopt new features.
One of the best things for streamers (in my opinion) is to encourage flexibility so that if some app they use doesn’t support new features, such as Extension Chat Messages, that they can adjust and succeed with their streams without that software so that they can best leverage new features that come out to enhance their brand.