If you click on the Library tab & then look at the Uploads column...the figure on the right shows attempted uploads & the figure on the left shows successful uploads ( eg 2/3 means 2 successful uploads out of 3 attempts).

Or you can click on the Monitor tab & that will show you your uploads in progress & maybe your completed uploads as well. If you want the Monitor tab to show all of your uploads per session (while you have LW open), then go tools > options > uploads > UNTICK 'automatically clear completed uploads' > apply > ok.