Hi, I was wondering if anyone could give me a hint for how to reverse engineer a sites PBN backlinks. Site XY is ranking before me but I cannot detect any relevant backlinks that point to the site with any of the standard tools, such as ahrefs, semrush, majestic etc. Yet I am pretty sure that they use a PBN. The content is very thin, no authority, not mobile optimized, young domain etc. In order to overtake them in the SERPs I would like to estimate the number and quality of links I would need to build. Any ideas? Thanks!