Yes, It is possible to blind cc multiple people in a text message on iPhone.
*goto Settings
*goto Messages
*you need to turn off “iMessage” and turn off “Group Messaging”.
now you can go to your text messages, create one message and add multiple recipients. Your text message will now go out as an SMS group message but each person will receive the text message individually. Their replies will come back to you individually and no one will be able to see one another or other persons responses.
I used this feature to successfully send out one message to a large group for my Super Bowl pool. Nobody saw each other and everybody’s replies came back to me individually, not in the group.
‘January 2023
iPhone 13 Pro Max