Solved.... Just edit the file in lsb-release etc or create it and add these strings:
DISTRIB_ID=Debian DISTRIB_RELEASE=11 DISTRIB_CODENAME=bullseye DISTRIB_DESCRIPTION="Debian" then edit the file: etc/hostname and put your distro the name you want and finally inside the folderetc/default c'รจ un file chiamato grub open it and edit the string 8 GRUB_DISTRIBUTOR="`lsb_release -i -s 2> /dev/null || echo Debian`" with GRUB_DISTRIBUTOR="`lsb_release -d -s 2> /dev/null || echo Debian`" put everything in includes.chroot by first creating a folder called etc and inside etc put the lsb-release and hostname files then create a folder inside etc called default and copy the grub file modifying it as I wrote above
