Isn’t the entire idea of the podcast index that they aren’t relying on a single platform for their source of truth? Podcasts are decentralized by design so in theory all links to podcasts should be scrape-able in some way (just as Google scrapes websites). One of the sites the podcast index should scrape is Apple, but it should by no means be limited to a single platform.
The decentralization works against discovery. For the longest time I couldn't find many DOS gaming podcasts. Then I happened to search Spotify. Lo and behold there are more there, and their recommendations helped find adjacent podcasts. Of course Spotify is a walled garden, so I have mixed feelings.
Full disclosure, I work for a company that provides a paywall to podcasters. (Among other things.)
