As the primary goal of reports is to present answers and data and less often (and usually by fewer people) to be edited, since 12.4 the "context menu" gear icon is hidden by default. This is especially important for readability of report in the presence of many small tile-like sections.
However, there are two ways to show those menus:
1) You can show them temporary with "Actions" > "Toggle editing"
2) You can set property for all or selected users which will then by default enable those menus permanently. This is a recommended solution for those users who frequently create or modify reports.