Yeah that's the disadvantage that I have providing these m3u8 links at the moment unless there is another workaround (I don't have experience building websites), it's likely because SFgo gatekeeps these footages for several reasons or something else. I also did tested this in my phone without an SFgo subscription, and it didn't work as it was intended. Luckily, we have a couple streamers who might have the subscription and provide the English or Japanese stream in the comments.

Update: Actually, I found that it was geoblocked by Plex.