UEFI Variables on Surface Pro 4+

[TheQuentincc]

Hi,
I have a dump of Surface Pro 4 bios and I would like to extract UEFI variables. Usually I'm using UEFITool to search the text of a bios option (for instance "Bios Lock", "OC Lock"...) to locate the "Setup" part, extract it and using the IFR Extractor tool.
But in case of the Surface Pro 4 and onwards (tried on SP5 dump as well) I'm not able to locate the "Setup" part, at least not one that can be extracted using IFR extractor. I would like to know if it's possible to extract a list of the UEFI variables along their adresses and parameters to play a bit with them (mostly to restore undervolting capabilities thanks to plundervolt fix) ? Does someone knows how to do such a thing ?
Thanks a lot

[SMDFlea]

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