Damus had to remove that option because Apple is petty. You would have to go to person profile page. There should be a lightning symbol on the top of their profile page. Android clients have the zapping post option and so does Desktop clients. Apple does not like freedom.
Apple doesn’t like flagging to kill when running neither, so thats that.
https://main--comfy-gnome-e2067d.netlify.app unlocks note zaps