In the Analytics page of Nelio Content you can see both the pageviews and the engagement of the different posts.

Note that there may be some field of analytics that does not display a number but a hyphen, as shown in the image below.

This indicates that the particular value could not be calculated, or has not yet been calculated. Note that Nelio Content computes the analytics of a few posts in each iteration. If something has not been calculated, you just have to wait until Nelio Content finishes calculating the value. That will happen automatically without you having to do anything.
Due to some social networks limiting the number of requests we can make to get the value of each analytic, it is possible that in some metric you see hyphens instead of values. Do not worry, in a later iteration of the Nelio Content analytics calculation you will end up getting the specific value.