not showing in boot picker when Using own image file

[dev-hann]

i ran sonoma image and install xcode.
and copy mac_hdd_ng.img file by 'docker cp ' (about 50GB file)

and

'docker run -it --device /dev/kvm -p 50922:10022 -v /tmp/.X11-unix:/tmp/.X11-unix -v "${PWD}/mac_hdd_ng.img:/image" sickcodes/docker-osx:sonoma'
run this command . but in boot picker not showing that i made OS.

Am i using wrong?
Screencast from 05-15-2024 04:10:51 PM.webm