Motorola announced the Moto Z4 a few weeks ago and mentioned a number of new features, such as a 48MP camera, but didn’t mention stylus support.
The user asked if anyone had been able to successfully use their Surface pen on the device, and another user replied saying his Surface pens worked on the Moto Z4.
It’s interesting that Motorola didn’t advertise or mention the stylus support in their product announcements. Although it’s not a hugely significant feature, users would benefit from knowing the feature existed.
It is unclear why the product page no longer mentions the feature as outlined by XDA Developers, especially since it’s reportedly working.
Source: XDA Developers