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7020100
(Get the code!)
The attachment in comment #10 confirms the problem is happening at a low level in the kernel. Although Xorg could override that if it was smart enough. In theory you can do it manually but would need to become an expert at crafting modeline entries to get it working. I don't know how myself. If that's possible then the data you need is in comment #7.
Obviously Windows 10 demonstrates that it is possible to support this monitor with this HDMI port. Only Linux does not yet...
As a workaround, if you have a USB-C port and an appropriate cable/adapter then you might be able to use the DisplayPort on the monitor. If that works then it should give different timings and might provide the 4K option... also at 60Hz instead of just 30Hz.