That's correct. Since I don't modify the RSS, it only contains what is published ("source of truth"). It's the same as the original RSS feed https://feeds.podcastindex.org/pc20.xml with IPFS links to the audio.
But the IPFS website contains episodes back to when the show was first monitored (episode 7). I suppose I could generate an "archive feed", but I only store the enclosures on IPFS. I don't store the transcripts, chapters, splits, or even show notes for old episodes (maybe I should?).