i think i've seen this somewhere else, but what if instead of 🌎 🔓 🔒 ✉️ , the privacy levels were just
👀 Visibility
├🌎 Public
│├☑️ Post to local timeline
│└⬜ Post to global timeline
├🔒 Followers Only
└✉️ Direct Message
Can also display a helper tip underneath:
masto privacy talk 2
@Raspberryfloof "unlisted" would just become "public" but without the "post to [other] timelines" options