The link you posted above the pic. Is that the one not loading the iframe? When I created a post in my instance (Tests-passed) up to date it loads
https://www.twitch.tv/paymoneywubby/clip/AmazonianMoralSwordCharlietheUnicorn-JoRQeBi1QJuyKfu2
Here on Meta doesn’t load
Screenshot from my forum.
I thought it might have been added via the iftrane Customization > Theme component & site settings. But twitch is not directly added to either.
My dashboard for version
Additional info This is in my Google Pixel 8 Chrome