How to adjust p value after Wilcoxon rank sum test?

Can you please help me figure out how the adjusted p-values were obtained in the attached figure. Did they perform Wilcoxon rank sum test and then divided the resultant pvalue with the total number of genes tested?

The figure legend: Expression fold change between cancer (C42B) and normal (RWPE1) cells
of genes that are located in large size normal-specific TADs (red, see the symbol ❖ to the right side of graph in c) and not large size normal-specific TADs (blue, solid diamond ♦) (Wilcoxon rank sum test, adj. p value < 0.05, adj. p value < 0.01, adj. p value < 0.001)