Glad to have a FOSS podcast app. I switched to Antennapod after Google Podcasts shut down. I have about a dozen podcasts I listen to, half of them from Patreon RSS feeds. Works great!
Having said that, Overcast for iOS is great. The main missing feature vs. AntennaPod is that I can't browse + select podcast episodes using the job wheel / touchscreen on my non-CarPlay car.
That feature barely works with Apple Music (and not at all for other first-party or third-party apps), so I suspect it's an iOS issue more than an Overcast issue.