Hi @gabbar08,
A warm welcome to the Roku Community!
Kindly be informed that all the recent features with channels on the Roku platform will be available when the Roku device is updated. If you wish to have the adjust playback speed feature on your Roku TCL TV, it's recommended to perform a system update, and it has the benefit of all other recent features of channels and Roku OS. You can update the system by navigating to Settings > System > System Update.
Keep us posted on what you find out.
All the best,
Kash
Takashi O.
Roku Community Moderator