The applet launcher incidents has sections My incidents , Group incidents etc. In this case the applets under the section My incidents were not visible. The section did showed up correctly but the applets were not visible inside of the sections.
This issue was happening because the item view which is inside the main item for the applet did not had the table field set which was a mandatory field.
See screenshot for more information on this.
Once we set the table as incident then the issue was fixed and all the applet launchers which had this item view appeared in the applet launcher sections.