The Masters section on the left of the Slaves shows the masters grouped by BD cells. Each BD cell has a set of master interfaces, represented by vertical columns in the cell.
The following figure shows two cells named versal_cips_0 with six master interfaces and noc_tg with one master.
Figure 1. Masters
Vivado Design Suite release 2025.1 and later, does not populate the contents in the Address Map tab by default, you must click to generate the Address Map contents.