ADDITIONAL SYSTEM INFORMATION :
OS: macOS BigSur 11.7 (20G817)
JDK: OpenJDK 21 Early-Access Build 4 (but also tested for OpenJDK 17, 19, and 20 EA Build 30)

A DESCRIPTION OF THE PROBLEM :
Calling Taskbar::setProgressValue shows an OS-provided progress bar on top of the app's icon in the dock. This works as expected. However, when packaging the app into a macOS application bundle using jpackage, the progress bar is not shown. See the steps to reproduce and attached source code for details.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Put the attached code into Main.java. Compile the program and create an application image via jpackage:

javac Main.java
jar cf app/main.jar Main.class
jlink --add-modules java.desktop --output rt/
jpackage --type app-image --runtime-image rt/ --input app/ --main-jar main.jar --main-class Main

Run Main.app.

To isolate the cause of the issue, further notice that:
 - When running Main.class using the runtime produced by jlink, the bug does not occur.
 - When running the executable at Main.app/Contents/MacOS/Main, the bug occurs.
Hence, the binary produced by jpackage appears to cause the problem.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
A half-completed progress bar should appear on top of the app's icon in the dock.
ACTUAL -
No progress bar appears.

---------- BEGIN SOURCE ----------
import java.awt.*;

public class Main {
    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            new Frame().setVisible(true);
            Taskbar.getTaskbar().setProgressValue(50);
        });
    }
}
---------- END SOURCE ----------

FREQUENCY : always