30 Hz max via USB-C and RJ45 not functional
USB-C only offers 30Hz on MacOS. I tested with two different USB-C cables and the result was the same, 30Hz max. The screen offers 60Hz max when switched to HDMI.
What's more, the RJ45 port, which is supposed to make a 'wired' connection, doesn't work on MacOS.
On Windows, the maximum frequency offered to me is 60 Hz, contrary to the 75 Hz sold on the product sheet.