I multiboot linux systems because I write C code and compiled output is not consistent in size.
My main boot is Fedora 32,
In the grub.cfg are entries for EndeavourOS. Except for the recovery entry, none of them work.
I also have an entry for arcolinux and Fedora’s grub.cfg, all arcoLinux entries work.
By the way, I can try from mint to Endeavour, or from SUSE Leap to Endeavour, with identical problem.
Would like to be more active with EndeavourOS if I can boot it from any other distro’s grub.cfg