Adaptive Card tabs aren't supported in the new Teams client. If your users use an app that uses Adaptive Card tabs, we recommend that you reach out to the app developer and request them to rebuild the tab as a web-based tab.
Adaptive Card tabs aren't supported in the new Teams client. If your users use an app that uses Adaptive Card tabs, we recommend that you reach out to the app developer and request them to rebuild the tab as a web-based tab.