Roku 3930eu express not adding prime video

Roku tends to restrict those things as well as the apps tend to block or restrict efforts to do so.

Amazon would need to mark their Roku app as being available throughout the world (not just countries that Roku itself supports.) You can encourage them to do so. Some streaming services have actually been surprised that they had limited their apps in that way, but others do it intentionally.

Hi, Next2win 

Thanks for posting, and welcome to the Roku Community.

We understand your concern with your Roku device that does not add Amazon Prime Video.

As advised by other users in this thread, the availability of channels depends on your current location. You should contact Amazon for this matter and inquire further about their app's availability in your region.

For more information, you can visit their support at Amazon Prime Video Official Help Site.

We hope you find this information helpful, and let us know if you have further concerns or inquries.

Thanks,
Kash