Are both your computers connected to the internet? YES VIA HARDWIRE CABLE INTERNET...NO WIFI.
Are you able to send any kind of Message between the two computers? YES WE CAN SEND MESSAGE TEXTS AND EMAIL FINE. I CAN LOG INTO THE OTHER COMPUTER VIA SCREEN SHARING - WHEN YOU LOOK ON THE NETWORK YOU SEE THE OTHER LAPTOP AND YOU CAN LOGIN AND THEN VIEW THEIR SCREEN.
Are they both signed into an Apple ID? YES, BUT DIFFERENT IDS OF COURSE.
Do both computers show up in Find My? YES
BOTH LAPTOP ARE NEW MACBOOK PRO M2 RUNNING THE LATEST SEQUOIA.
APPRECIATE THE QUESTIONS. EARLIER I SHARED THAT I TALKED TO APPLE AND THEY RAN OUT OF TESTS AND COULD NOT EXPLAIN IT. WE VERIFIED THAT THE APP - SCREEN SHARING - WHICH I HAVE NEVER USED BEFORE BUT APPEARS TO BE THE CODE THAT MESSAGES IS ACTUALLY USING FOR THE INTERNAL "SHARING" FUNCTION - WORKS FINE FROM EITHER LAPTOP. AS FAR AS I CAN TELL, SCREEN SHARING APP DOES NOT HAVE SOUND BUT WHEN YOU USING SHARING IN MESSAGES YOU GET SOUND AS WELL AS SCREEN.
DON'T KNOW IF YOU SAW MY NOTE BUT WHEN I TRIED TO SHARE SCREEN TO A FAMILY MEMBER OFFSITE, WHEN I HIT "SHARE" AND SHARE MY SCREEN IT OPENED "FACETIME" AND CALLED HIM WITH SCREEN SHARING ENABLED. IT'S ALMOST LIKE SEQUOIA IS USING FACETIME TO IMPLEMENT SHARING INSIDE MESSAGES...
APPRECIATE THE QUESTIONS.