Yep - each post has an activity section that lists boosts, reduces (Mastodon style instances) and favorites (upvotes - Lemmy style instances) and the users who made them. Upvotes are under the favorites tab. Examples:

My comment:

https://kbin.social/m/showerthoughts@lemmy.world/t/215157/100-upvotes-on-Reddit-is-1-upvote-on-Lemmy/comment/903264/favourites

Your comment:

https://kbin.social/m/showerthoughts@lemmy.world/t/215157/100-upvotes-on-Reddit-is-1-upvote-on-Lemmy/comment/906004/favourites

If you’re on kbin, you can access this under the “more” menu next to the reply & boost buttons beneath each comment.