A possible way to achieve location specific context-menu opening through App designer is adding the following piece of code inside the callback function defined for 'ContextMenuOpeningFcn' property of 'uicontextmenu()':
row = event.InteractionInformation.Row;
col = event.InteractionInformation.Column;
app.currentRow = row;
app.currentColumn = col;
% The above piece of code enables you to track the row and column of a UITable which user
% has clicked or from which the context-menu is triggered.
I have used this code for version R2023b, there it works well but not sure if it will work for earlier versions of MATLAB.
Hope this helps!
