We went ahead and forked¹ it just for itunesTitle, but I will likely need podcast:follow² and podcast:contentLink³ before they’re officially formalized.
¹https://github.com/episodesFM/partytime
²https://github.com/Podcastindex-org/podcast-namespace/discussions/609
³https://github.com/Podcastindex-org/podcast-namespace/discussions/614