Link parkin’: a few self-hostable podcast frameworks:
PinePods is a Rust based app that can sync podcasts for individual accounts that relies on a central database with a web frontend and apps available on multiple platforms
Podgrab is a is a self-hosted podcast manager which automatically downloads latest podcast episodes. It is a light-weight application built using GO.
PodFetch is a simple, lightweight, fast, and efficient podcast downloader for hosting your own podcasts.