that is because speed wallet is monkeypox but at least they do give some shit about zaps
we tested zaps on this note… we made six attempts to⚡zap this note, at dobkun@speed.app, over a period of 8 minutes. Six of the zaps were successfully paid... please check for 6 satoshis received. problem: we found that your lightning address server **did not* properly produce zap receipts, and/or didn't send the zap receipts to the relays specified in the zap. (the zap spec requires that the zap receipts be sent to the relays specified in the zap.) this means a nostr user who zaps you might not see a number appearing next to the ⚡ icon after zapping.... if you wanted to fix this... you could try getting a free rizful lightning address -- https://rizful.com ... if u get it set up, pls reply here so we can do this ⚡zap test again.
Discussion
Basically speed.app addresses don't support zaps. You can receive zaps, but they don't do the rest of the process that is necessary for the zaps to show on your notes... that's why we recommend a serviced like Rizful.com which designed for nostr and zapping...