Syncing among devices not working, especially text messages.
My text messages show up on my iMac but not my iPhone or will show up on iPhone but not on my iMac.
iPhone 8, iOS 15
I don't know if this will solve your issue but on your Mac make sure Messages/iMessages settings pane has this checked:
And on your iPhone General/Messages/Text Messages Forwarding is turned on
That's what I have and I get messages on both devices. 🤞