Build factory bin for Archerc5v2

I am trying to build image for Archerc5v2 router, successfully build squashfs-sysupgrade.bin and squashfs-tftp-recovery.bin but not the squashfs-factory.bin. Same issue faced for archerc50v4 is there any configuration I missing in menuconfig, if not what is the way to generate factory bin for each build ?

same question. Anyone can help us to fix this problem? thank in advance!

AFAIK there is no such thing as a squashfs-factory.bin for the Archer C5 v2.

-> OpenWrt firmware downloads for Archer C5 v2

Which installation instructions made you think that a squashfs-factory.bin exists and that it would be needed for installation?