To make use of the changes made to the Bill of Materials (BOM) it must be saved to an *.ICB file - a BOM template. Those are placed in a folder parallel to the Drawing (*.ICD) and Scene (*.ICS) templates under the folder %appdata%\IronCAD\IRONCAD
Then, depending on which version you are running, the next folder will have the name of the version number where version 2022 equals 24.0 (v2021 = 23.0 etc).