How to show in a view the total number of paragraphs for a node?
I managed to achieve this doing the following:


Create a View to show Content of Type All. Add a page as well if you wish.
Format the style to be a Table.
Go to Advanced and turn on "Use aggregation".
Go to aggregation settings for the field "Content:Title" and set the aggregation type to "Count".
Change the label of this field to something like "Number of paragraphs in the node:".(*optional)
In Fields add field "Content:Title", aggregation type should be Group results together.
Add Filter Criteria "Hours (field_hours:target_id)", aggregation type should be Group results together, and set the operator to "is not empty(NOT NULL)".


This is how the Display settings should look at the end:


And here are the desired results in the preview:



I hope this helps.