https://support.apple.com/guide/messages/change-imessage-settings-in-messages-on-mac-icht39422/14.0/mac/13.0 https://support.apple.com/guide/messages/change-ime

https://support.apple.com/guide/messages/change-imessage-settings-in-messages-on-mac-icht39422/14.0/mac/13.0 https://support.apple.com/guide/messages/change-imessage-set... > Send read receipts > Turn on read receipts so that people who send you messages see when you’ve read them. > You can also send read receipts for a conversation only. The per-conversation setting overrides the global setting. --- Note that some people don't enable this. One member of my family has read receipts off and I don't see anything on that one. Another member has them on and I can see 'delivered' and 'read' show up. Many people who are security conscious have that setting off by default because, well, security conscious. I would contend that not having read receipts as an option is important functionality for some.