Your example doesn’t hold water because on Twitch Itself, it has tons of Soft Porn, extreme sex chats and many other things that Advertisers wouldnt want there ads on …
You can visit r/livestreamfails and see examples directly from Twitch, with some of the biggest CCV Channels engaging in such content.
I would suggest if you can send a message to the Embed Team Owner, if they want a way to check if a website is at base min is ok to have ADs run,
tell em to check the ads.txt file at the root of domains
so example.com/ads.txt - If they have a ads.txt, it will list what Ad service they use which will most likely be google adsense etc, and they have standards which are similar to Twitch in terms of ads.
Best / easiest solution from my point of view.