Messages nt syncing across devices
I have MacBook Pro with Mojave 10.14.6, iPad 6th generation Software 12.4, and iPhoneXR Software 12.4. I am unable to sync messages across my devices. I have read through previous inquiries about this problem but they are too old. I have done things suggested but think that this is a new problem with the various upgrades in devices and software. Can anyone help?
iPhone XR