iMessaging on iMac - not receiving all messages
After my Macbook Pro died recently, I purchased an iMac 24". On my Macbook Pro, I was able to send and receive both iMessages, AND SMS text from non-Apple users.
With the iMac, I cannot seem to figure out how to set this up. I currently can only send and receive iMessages.
How do I set it up to do both?
iMac (24-inch, M1, 2021, 2 ports)