Thanks for the note here!
We'd recommend contacting BBC support directly for more information about the features of their channel across different models of Roku devices. If that feature is available for your model of Roku device, they can further advise on its use.
Note: Not all features may be available across different models/versions of Roku device and/or the channel (app). The channel/service provider can specify which models would offer support for any potential feature of their channel/service.
Roku Community Manager