I am trying to extract the values of subsidence and correlate the subsidence to another raster of land use land cover. How can I achieve this?

Convert your subsidence data to CSV, by using, StaMPS-Visualizer, SNAP-StaMPS Workflow , this could be found here,

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In case you use other software rather than Stamps and you have ready results of subsidence, convert to CSV and correlate them, if it’s possible to open you results in SNAP , you could easly convert it to CSV, or it’s possible by python.