CNN+MAF and mass estimator predictions for four random projections of four different galaxies in the validation set. Numerical profiles of cumulative mass calculated from the simulations are plotted as solid black lines, with CNN+MAF predictions shown as circles with their corresponding 1σ uncertainties, and mass estimator calculations displayed as grey markers with black edges. The colour of the CNN+MAF circle markers varies depending on the dataset on which the model has been trained. Each panel is labelled with the identifier of the galaxy whose results are plotted in it, specifying the simulation suite, name, and number of the halo in our halo finder. We show full posterior distributions of the CNN+MAF predictions in Fig. B.1.