To delete a group chat, open the chat client and select the “Delete Group Chat” option.
Yes, you can delete a Messenger chat for everyone.
If you delete a Messenger group, all of the messages in that group will be deleted as well.
To delete a Messenger conversation on one side, open the phone’s messaging app and select the conversation you want to delete. Then tap the three lines in the top right corner of the screen (the three lines that look like a checkmark) and select “Delete this conversation.
To delete a group chat on Messenger for everyone 2020, you can use the following steps:
open the Messenger app and sign in
click on the three lines in the top left corner of the main screen
select “Delete group chat” from the list