https://wccftech.com/amd-super-efficient-ryzen-7-pro-6860z-apu-with-zen-3-core-architecture-exclusive-lenovo-thinkpad-z-laptop/

AMD has launched its Ryzen PRO 7000 series APU lineup based on the Zen 3+ core architecture but there seems to be one SKU that is exclusive to a particular OEM. This particular APU is the Ryzen 7 6860Z and is designed exclusively for Lenovo's Thinkpad Z laptops.

There aren't a lot of details that AMD itself is sharing for the Ryzen 7 6860Z APU but one would guess that it is a higher-binned variant of the Ryzen 6850U. In their presentation, AMD states that the Ryzen 7 6860Z has been designed in deep collaboration with Lenovo which doesn't sound that surprising since Lenovo has been getting that exclusive treatment from AMD for a while now (check Threadripper Pro).