A DESCRIPTION OF THE PROBLEM :
You can also see this in the code:

https://github.com/openjdk/jdk/blob/fea5f2b1458cdd53f437e59caaffaa6e22fb59a7/src/jdk.jpackage/linux/classes/jdk/jpackage/internal/LinuxPackageBundler.java#L366-L372


I could confirm that the option accepts parameters and those affect the output .deb:

This is the .deb I got with this jpackage command: jpackage --type deb --name yt-dlp-compose --input build/libs --main-jar yt-dlp-compose-1.0.0.jar --linux-package-deps ffmpeg

dpkg -I yt-dlp-compose_1.0_arm64-ffmpeg-dep.deb
 new Debian package, version 2.0.
 size 37176504 bytes: control archive=1127 bytes.
     531 bytes, 11 lines control
     867 bytes, 38 lines * postinst #!/bin/sh
     819 bytes, 31 lines * postrm #!/bin/sh
     631 bytes, 35 lines * preinst #!/bin/sh
     789 bytes, 39 lines * prerm #!/bin/sh
 Package: yt-dlp-compose
 Version: 1.0
 Section: misc
 Maintainer: Unknown <Unknown>
 Priority: optional
 Architecture: arm64
 Provides: yt-dlp-compose
 Description: yt-dlp-compose
 Depends: libasound2t64, libbrotli1, libbsd0, libbz2-1.0, libc6, libfreetype6, libgcc-s1, libgif7, libglib2.0-0t64, libgraphite2-3, libharfbuzz0b, libjpeg-turbo8, liblcms2-2, libmd0, libpcre2-8-0, libpcsclit
e1, libpng16-16t64, libstdc++6, libx11-6, libxau6, libxcb1, libxdmcp6, libxext6, libxi6, libxrender1, libxtst6, zlib1g , ffmpeg
 Installed-Size: 160957
While the .deb without dependencies does not have this dependency (jpackage --type deb --name yt-dlp-compose --input build/libs --main-jar yt-dlp-compose-1.0.0.jar):

dpkg -I yt-dlp-compose_1.0_arm64-without-deps.deb
 new Debian package, version 2.0.
 size 37177420 bytes: control archive=1122 bytes.
     523 bytes, 11 lines control
     867 bytes, 38 lines * postinst #!/bin/sh
     819 bytes, 31 lines * postrm #!/bin/sh
     631 bytes, 35 lines * preinst #!/bin/sh
     789 bytes, 39 lines * prerm #!/bin/sh
 Package: yt-dlp-compose
 Version: 1.0
 Section: misc
 Maintainer: Unknown <Unknown>
 Priority: optional
 Architecture: arm64
 Provides: yt-dlp-compose
 Description: yt-dlp-compose
 Depends: libasound2t64, libbrotli1, libbsd0, libbz2-1.0, libc6, libfreetype6, libgcc-s1, libgif7, libglib2.0-0t64, libgraphite2-3, libharfbuzz0b, libjpeg-turbo8, liblcms2-2, libmd0, libpcre2-8-0, libpcsclite1, libpng16-16t64, libstdc++6, libx11-6, libxau6, libxcb1, libxdmcp6, libxext6, libxi6, libxrender1, libxtst6, zlib1g
 Installed-Size: 161654