In an AppleScript applet, compiling and exporting in Script Editor replaces a custom icon with the default. To retain a custom icon, it is necessary, after exporting, to use Finder's "Get info..." to copy the icon from another file and paste into the icon for the applet. The custom icon is stored in the "Icon?" file, located in the root of the applet bundle. The applet can then be signed and notarized.
With macOS Tahoe, that procedure no longer works. That is because the notarization process now wipes the "Icon?" file. The file remains in place but has zero size. Thus Finder shows the default applet icon.
Does anyone know of a way to provide a custom icon for a signed and notarized AppleScript applet ?