Fountain might be what you're looking for. It's more old-school podcast app than nostr client, but you can comment... zap. I don't know if they still do it, but they used to pay me a tiny little bit for listening to podcasts on their app.
Discussion
Actually, I take part of that back. It's a straight up nostr client now. I guess I haven't loaded it for a minute. I usually use Podcastguru...