There was/is quite many of those done via the RSS-bridges already but I never found them to work consistently. Either it was the nostr client changing the relay settings (removing the bridge relay) or something else happened (the bridge stopped updating). I collected some 50-100 on my following list in the spring but don’t have them anymore. A micro-bot / service where you could look for your favourite user with their handle (twitter/mastodon/bsky), website address or RSS-feed address might help in discovery and feed population, and add them if they don’t have a feed yet. This is the other way to do it on the client side: note1vlq9mu02glchlh9d7a6qv7tgy5gqvppk3r8lxlp0fc48d4er652q87llt3