npub1cscw5kknl3mwpqs8g8udnnwklzwpa2klfzl4wpumuwyjypppg5aset8pjk (npub1csc…8pjk) you mean in the "Add or edit topics" feature? It's similar, but seems quite secondary to composing content, whereas LinkedIn proposes them inline, where the audience will see them prominently.
Medium also doesn't link inline hashtags in the body of articles.