Text messaging has become less efficient with 13.1.2

How can I send the same text to over 100 people efficiently without it being a group message, without everyone seeing the names of the other recipients (similar to a BCC in email) and receive responses from those recipients with those responses being only visible to me? I have version 13.1.2 Apple XR and, prior to the upgrade to 13.1.2 I would send each recipient (customer) an individual text which took me about 15 minutes for 100 customers/recipients using copy and paste. BUT with the new update, the scrolling direction has changed and this has changed the whole dynamic of sending individual texts. After sending one text message and returning to my list of recipients, I am now on the top of the list of names and have to scroll all the way to the bottom of the list to locate my next recipient. With over 100 customers, the completion of this task now takes me almost one hour! I hope this is clear and makes sense. Thank you.