Following up on this. Many of us want an alternative to YouTube. Do you have a financial relationship with them that is keeping you from creating these Apps? I have no idea who owns Rokfin. I hope Google has no financial interest.
With few exceptions (like the Roku Channel) Roku does not create create channels. Roku provides the platform and the content owners, like Rokfin and Odysee, must create their own channels for Roku. Ask the content owners to get busy!