Users can create part PMI but it will not directly be displayed in the Assmbly. The following steps will make part PMI visible in the assembly view.
1.Make sure the Parts are fully loaded
2.Go to the Part Navigator
3.Right-click on the PMI Assembly Filter -> Add Filter -> select Display All
4.Right-click on the new filter and select Apply to Views…
5.Select from the list of Views to apply the filter