It's a good idea. The funny thing is that from start i have heard some people mock about nostr as a "glorified rss feed"; as a response to that this idea would be really funny on top of actually being useful.
I suspect the nostr -> rss, pipeline could be done on any client. Just like blog -> rss is done. Possibly webb clients are optimal for this. So maybe coracle.social? nostr:npub1jlrs53pkdfjnts29kveljul2sm0actt6n8dxrrzqcersttvcuv3qdjynqn