HeyLemao Wu, I was wondering if any there is any more news on nested relationships within WAB? It looks like WAB for portal still does not see nest relationships.
For my specific case, I'm clicking on a parcel feature and accessing related table features through the popup. (Related features open up in the attribute table). My goal is to dig down two tables deep to access information in table 2: Feature Class -> Table 1 -> Table 2