In 2018 Renesas had a "Facial Expression Kit Giveaway" contest and I was one of the winners. It was the "RZ Omron Facial Expression Kit giveaway". RZ being one of their newer, at the time, Micro lines. I had to sign an affidavit to get my prize, which I did. Never did use it and it eventually went to a local Hamfest. Their example code was a vending machine.
This is the only related item I could find today:
"OMRON Develops Real-Time Facial Expression Estimation Technology"