I installed mkbootimg on my debian vm and also tried the unpack_bootimg command and got this:
```
zekiu@pmos-debian:~$ unpack_bootimg --boot_img /mnt/share/boot.img
boot_magic: ANDROID!
kernel_size: 39464976
ramdisk size: 11988527
os version: 11.0.0
os patch level: 2023-03
boot image header version: 3
command line args:
```
but I don't know if it's the same program/version as the output is different to yours