There isn't a tally of total upvotes like on Reddit, but if you tap the three lines in the upper right, tap your username, and then tap "profile," you can see each post and comment you've made along with upvotes and downvotes. You can even sort by age, top all time, and all the ways you can sort posts.
Oh, sorry. I don't believe that's in the interface anywhere. It's a feature that could be added easily enough, but I don't think it's available today.