As a Wix Web Designer, I get a lot of questions about how to adjust Wix websites including the blog pages. Here are two tutorials on how to turn on and off commenting in the Wix blog.
Where to turn Commenting on or off in Wix Blog:
First, check out this video to show you where to turn the comments on or off in Wix Blog. Go to an individual post, click on:
Settings > Display (make sure to scroll down)
> Recent posts and Comments, then switch Commenting OFF.
Display Comments on Certain Blog Posts:
If you want to display commenting on SOME posts, then you can turn Commenting On (see above), and then go to each post individually to turn the comments on or off per post using the settings found under the circle with three dots next to each blog post as you roll over it. See video to explain: