https://wccftech.com/apple-ar-headset-ship-with-m2-and-16gb-ram/

Apple’s first AR headset was earlier said to tout performance equivalent to the M1, but we have found out that the version currently being tested may sport the latest M2, along with ample RAM.

Processing and rendering mixed reality content require an immensely powerful chip, something that the M2 should be able to handle. It is understandable why Apple is not going for the more powerful M1 Pro or M1 Max, as the M2 requires less power to perform optimally, meaning that the AR headset will not require an elaborate cooling solution to keep the chip’s thermals in check, which would have added to its bulk.