NX Model Views not listed in Part Navigator

The Part Navigator is not listing any Model views

The most likely reason for items to not be seen in the Part Navigator is due to an active Filter. To confirm this perform an MB3 in the navigator to see if the 'Apply Filter' option is checked on. If so, uncheck it.

To create such a filter a user would have selected the Model Views in the Part Navigator and selected 'Remove Item' to create the filter to remove the entire item.

More details on using Filters can be found in the NX docs

https://docs.sw.siemens.com/en-US/doc/209349590/PL20230425446868577.modeling/xid1594712