(a) CMD partitioned into three regions along the WD CS. The azure-shaded region indicates sources that pass the selection on the blue side of the WDs, while the red-shaded region represents those on the redder side. (b) WD CS LF, displaying histograms depicting the number of sources per magnitude interval for observed stars within the WD region and for stars in the two shaded regions. The magenta histogram represents our model for field distribution. (c) WD CS LF derived by subtracting the field model from the observed WD CS LF. (d) Observed field-corrected WD CS LF, adjusted for completeness, depicted in black. Grey-shaded areas indicate the 5- and 3-σ levels, where below 3-σ findings and completeness become unreliable. Errors were linearly propagated and then corrected for completeness.