Extreme value statistics analyses of joint H₀ anisotropy in the FLAMINGO lightcones using the MCMC (left) and M21 (right) methods without (top) and with (bottom) matched scatter. Grey and orange histograms show the lower-bound projection of all 1728 lightcones without and with scatter, respectively. The red vertical line marks the M21 result under the same projection. The blue dashed line indicates the GPD threshold (90th or 95th percentile), above which the tail is modelled by a GDP, shown in green. The small shaded green region around the best fit line represents the 16th to 84th percentile region of bootstrapping error of the fit. Annotated in red is the EVS probability of obtaining the M21 result in FLAMINGO.