Hi!
Disney plus is now available in Israel, but for some reason isn’t available on my Roku. Why aren’t the Roku steamers updated?
Roku isn't the provider of the Disney+ channel, Disney is. And only Disney can make their channel available on Roku devices in a specific country. Since Israel isn't an officially supported country by Roku, It's possible Disney will never make it available. But again, it's up to Disney to make it available on Roku.
Here is a list of the only Roku officially supported countries: