You need/want one or the other, an iFrame or the JS embed code. (Your JS embed/page lacks the JS embed lib/helper), but that doesn’t seem to be the issue.
There isn’t any further informtion that can be provided from the other third parties on this forum.
Since your code seems correct but it still doesn’t work. So it seems to be a policy violation but we/this forum just don’t know, since none of us are staff and they don’t often frequent this forum. Nor have we/this forum/other third parties have anywhere to direct you to.
Thats why it’s been hidden from the main index. To stop randoms chiming in. You may or may not get a follow up from Twitch staff on this but thats not something I can promise. I have flagged this post/thread up the chain , but that may not result in a response from them.