Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
There could be a variety of reasons why Disney+ may not be available on your device. What are the model numbers of your Express devices? Where are you currently located?
What OS version are you currently running on each of your devices? Have you manually tried to check for software updates? You can do this by going to Settings > System > System update.
Please keep us posted, if you would like us to take a further look into this issue, please feel free to send me a private message with your Roku account email address that is linked to your Express devices, as well as your serial numbers of your devices.