Support for Image.GZ or Image.gz-dtb in boot.img

[Rofikkernel]

currently i see, unpacked boot.img extract uncompressed kernel with name "Kernel" but that files did not contain appended dtb files
in example mkdtimg support that

mkbootimg --kernel Image.gz-dtb --ramdisk \
out/target/product/pixel3_mainline/ramdisk.img \
--base 0x00000000 --pagesize 4096 \
--cmdline "" --output boot.img 

Can it be used in Android_boot image editor ?

[cfig]

Can you attach example file? And what is the target device? Pixel 3?