You can login into the vercel app from web with extention and post a message from there along with the emojis (the format is :nameofemoji: and will be in the note, not as a reaction, the name of the emojis are in the packs or you can make your own emojis). It will show on your damus nostr profile as well as a note. How will damus display it, well up to test 🤙