I don't think so. As I see it in the Lemmyverse there are threads without comments (image posts for example) but if there's a topic with a question or where opinions can made you can find activity there.
Yeah, it's not a million subscriber reddit community level activity, but it's still activity.
I think people sometime think they deserve the same experience on a different environment just because they are used to one behavior pattern. As more and more people sign up for a Fediverse instance there is a chance the number of people who thinks like that will increase.
For them I recommend to think twice before they become impatient. Fediverse is for people, by people. Who usually work on their instance in their free time.
As a conclude I would like to thank most of the Fediverse instance operators and users for what they are doing. Without them the Fediverse would be a deserted place.