I kinda get why the GrapheneOS developers don’t want their product discussed on reddit: Imagine you’re searching for a problem with GrapheneOS and the only thing popping up is a Reddit thread. They don’t want their users having to go there as the “only” option to get their problem fixed
I’m using GPodder with AntennaPod on my smartphone and Kasts on my PC. Works good if you don’t switch between smartphone and PC very often (it syncs every x minutes with the server, so it can get out of sync if you start using your other device and sync hadn’t happened yet)