If you're looking for an RSS reader that has a chance of having native Nostr support and runs locally on desktop, this might be a good one:

nostr:nevent1qvzqqqqqqypzqpadlk5uttwgpzqmk2jjyrmwxxq7pszrhy86z9wy7xp5vspzj68xqy8hwumn8ghj7arfdfkzu7re0ghszxnhwden5te0wpuhyctdd9jzuenfv96x5ctx9e3k7mf0qy88wumn8ghj7mn0wvhxcmmv9uq3vamnwvaz7tmhda6zuum0we3xjapwdphhxap0qythwumn8ghj7mn0wd68ytntdaek6mmn9ehhyee0qqsv0uft8aragkzsvfkl0llf4km7st5s4d9cexppz0pny2yn6k6p2lgdfzx2h