I am unable to send MMS messages from my iPhone X to any android phone using the default Apple Messages app. It will work with the Verizon Message+. It tries to send but comes up with the error "Your message was not sent. Tap "Try Again" to send this message.
My wife, who also has an iPhone X is having the same issue.
I understand your concern with not being able to send MMS to Android devices. Let's work together to get to the bottom of this. When did this start? Are you having any issues with group messages? DerekR_VZW