You should try adding the rss feed to podcastindex.org and fountain should pick it up.
Episode 0001
TOUCH GRASS
Now on Fountain ⚡️
Please do me a favour.
Let me know if you can open this. And if you can find the show on Fountain. I’d very much appreciate it.
We’re trying to pull the RSS onto Fountain and have been having issues.
https://anchor.fm/s/f65084c0/podcast/rss
#golfstr 
Discussion
Thank you! This may have worked