I have had this problem for over a year. I have an iphone 16 pro but it was the same with previous phones. I can't receive group messages if an android is on the chain (i receive the message and all replies as individual texts.) I also can't send any pictures to android users.
I get the error "Cannot Send Message: MMS Messaging needs to be enabled to send this message." All of my settings are correct. I have spent HOURS troubleshooting with Verizon, done every reset 50 times, gotten a new phone and still have the same issue. They tried to blame it on Apple; I spent HOURS with Apple who then confirmed it's a Verizon problem.
This is absolutely ridiculous. I have 50+ tickets outstanding with Verizon; they always say someone will get back to me but no one ever does so I have to reach out and and start the process all over again, despite whatever "notes" someone has put on my account. This is such a colossal waste of time. I need to switch carriers because whatever deal i have on my new phone is not worth this.