The package highlighted in red is indeed from ST, but it is a 6-axis IMU

Bwana Kizito is right, the package highlighted in yellow is not a motion sensor. It’s part of the Qualcomm chipset and is packaged in a fan-out WLP.

No, it’s part of my job to understand what these packages are. I did some quick research.

I’m guessing the “silver guy”is a cage shield covering some devices. Pull it off and see what’s underneath.

Package on the left with the package marking that starts “YY” is a 6-axis IMU from Bosch. Package on the right with the “T” marking is a 3-axis accelerometer from STMicro. According to the tech specs the earbuds have “motion-detecting accelerometer” and “speech-detecting accelerometer.” The 6-axis chip would be used for motion so the 3-axis chip must be for speech detection.

With the way TI marks packages, “78CS9SI” is not the part number; use the second number instead. It’s tough to tell exactly from the image, but it looks like it might be “65912,” which would make it the TPS65912 power management unit chip.

“Possible camera combiner chip” is more specifically the OmniVision OV00680-B64G Sensor Bridge