Referring to the Support Request that was raised, Ability to export and import "saved filters" from one instance to another instance. as an example. As of now, the Filters are can only be exported and re-imported again through the XML backup of JIRA instance.

The Project Import tool only restores a single project from a backup file and it does not take into account the filters that are associated with it. It will be useful if there is an option to export and re-import Filters.