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On one of my displays, the right 30% or so of the display is slightly (but noticeably) tinted yellow.
If you move a white-coloured window from one side to the other you can notice this.
Is it possible to do some kind of sectioned calibration to compensate for this? So that I do 9 calibrations for example, for each area of the display and have it treat each one differently
No, AFAIK.
Unless your monitor has some uniformity compensation feature at HW level, you cannot solve your issue with current HW & SW in graphic cards*.
(*) Maybe it is possible to run a uniformity compensation map in GPU shaders but GPU driver would need lots of changes and maybe OS itself if you want to run this while in OS desktop enviroment (not fullscreen apps).
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