How to remove yourself from a group text or mute the ones you can't leave

Unless everyone is using iMessage, there's no way to remove yourself from a group text — you'll need to mute or block it.

iOS 14 lets you direct mention someone in an iPhone Messages group chat — here's how to do it

You can now direct mention someone in a Messages group chat on an iPhone running iOS 14, if all participants in the chat are using iMessage.