Apple appears to be testing Studio Display 2 and it's increasingly looking like this next-generation external monitor will run an unreleased A19 Pro chip.
Studio Display 2: What could Apple’s unreleased A19 Pro chip unlock?

Apple appears to be testing Studio Display 2 and it's increasingly looking like this next-generation external monitor will run an unreleased A19 Pro chip.
The updated MacBook Air laptop can drive two external 6K displays (like Apple's Studio Display) with the lid open—no need for clamshell mode.
Studio Display firmware update 16.4 enables support for in-field recalibration using Apple's Pro Display Calibrator tool and an in-house radiospectrometer.
The stylish accessory can now also be attached to the back of Apple’s Studio Display so you can hide hard drives, cables and dongles behind the monitor.
New Apple external monitors should cover price ranges between the $1,600 Studio Display and the high-end $5,000 Pro Display XDR model.
Apple's confirmed the most recent firmware update for its $1,699 external monitor fixes intermittent Studio Display speaker issues some owners complained about.
Learn how to solve intermittent speaker issues with your Studio Display, ranging from garbled audio to distorted sound to choppy playback and beyond.
Learn how to restart Apple Studio Display, which has no power button, in case you've encountered bugs or run into software issues after updating its firmware.
A fix for the Studio Display webcam woes (firmware update 15.5) will be released separately instead of requiring a complete macOS update, Apple has confirmed.
The second beta of Apple's upcoming Studio Display firmware appears to boost webcam quality but visual improvements aren't as pronounced as in beta 1.
Apple has released a beta version of the firmware update 15.5 which includes a fix for the widely panned quality problems with the Studio Display web camera.
Learn how to clean your Apple Studio Display, including the nano-texture version, to remove dust or smudges and keep it in pristine condition.