Is There a Way to Send an "Enter" Key to Messages.app in Big Sur?

[NaOH]

Regarding CardHop, there's an additional suggestion for using it for sending Group messages in another Forum thread from a year ago:

Send SMS to a Group?

In lockdown, I'm often needing to send a message to a specific group of coworkers, some of whom are on android. We have a long text thread going in Messages, but I'd like to automate the process. I have tried the SMS action in KM, which seems to work well for one phone number. I cannot figure out how to do it for multiple at once. (I realize this may be a limitation of the underlying AppleScript action, as I've tried to also do it via AS, and can not crack it for multiple recipients either.) I…