How is this the hyperscalers fault?
YouTube had atom feeds and I don't think Amazon and Microsoft have relevant syndication.
Meta is surely responsible but that's it, imo.
Google on several occasions took moves to make the web less semantic.
They dumped microformats and standards in favor of soupy error tolerant formats that benefitted their search engine and made it harder for other efforts to make information shareable and accessible.
They wanted it to be easy to get information in, but for you to have to go through them to get information out.
YouTube still does
I don't think they are linked to anywhere but the url is http://www.youtube.com/feeds/videos.xml?channel_id=<channel_id>