For groups, long-press on the message that you have sent and click “Show read receipts”. You will see one tab with the list of who has seen it and a second tab of who is pending receipt of the message.
For a 1:1 conversation, when the direct recipient has read your message there will be a double checkmark in the bottom right corner of your outgoing message bubble.
For groups, hover over your message and click the three dots that appear to the left of your message bubble. Click “Show read receipts”. You will see one tab with the list of who has seen it and a second tab of who is pending receipt of the message.
For a 1:1 conversation, when the direct recipient has read your message there will be a double checkmark in the bottom right corner of your outgoing message bubble.
