About the new targz-combined image

I noticed that a new image type was added in version 25.12 of the x86 architecture. What is the purpose of this targz-combined.img image file? It seems that this image file cannot be booted.

openwrt-25.12.4-x86-64-generic-targz-combined.img.gz

And doesn't produce any output during the failed/failing boot ?
Amazing.

It seems like the file system cannot be found