It's not on Roku's client, but it is on the web. Unfortunately, instead of showing it in the app as a single thumbs up, it shows none, so, you can overwrite you

It's not on Roku's client, but it is on the web. Unfortunately, instead of showing it in the app as a single thumbs up, it shows none, so, you can overwrite your rating without knowing or if you use that as a sign that you've watched the movie, you may get confused.