One of the buttons at the top of Solution Explorer is to Hide/Show All Files. When on/pressed/Show, the bin and obj folders show as dotted lines (may depend on themes and settings) to show they are VS folders:
Note that when you have it as Hide some other things are hidden. My Project for instance can no longer be opened/expanded:
The My Project files are all VS/Designer files which can be changed elsewhere (Settings tab for instance), but sometimes it is nice to just open one to check something.
Unlike C# projects, VB also hides References so you cant right click it for the short Reference context menu. Add Reference is still on the longer Project context menu and of course in Project Properties.