It's not supported in the Philippines.
"Note: The Roku Channel is currently available in the United States, Canada, and the United Kingdom on Roku streaming devices, web, and mobile, and in Mexico on Roku streaming devices only. Premium Subscriptions on The Roku Channel are available in the United States, except on Samsung TVs and Amazon Fire TV devices."
https://support.roku.com/article/360007223934
Roku Community Streaming Expert
Help others find this answer and click "Accept as Solution."
If you appreciate my answer, maybe give me a Kudo.
I am not a Roku employee.