I added this request to CANNY itself as a comment under https://feedback.canny.io/feature-requests/p/allow-users-to-filter-posts-theyve-voted-for, but their support team also told me that I should share with Levels that Levels could easily change the upvote visual in the lists to be more easily seen, via https://help.canny.io/en/articles/1627404-setting-your-branding. The current slight blue background coming from Canny's defaults is almost undetectable either on my monitor or to my aging eyes.