Fedora install on shared OS loss previous OS on grub menu

Ask Fedora
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1

Yesterday I installed Fedora 43 (file Fedora-Workstation-Live-43-1.6.x86_64.iso) and after installing, on the new grub menu disappear entry Archlinux on nvme disk lvm volume. Also older Archlinux on sdb2 lvm volume does not boot.

I think Fedora installation should allow editing the new grub menu while viewing the old one when the installation is shared with different operating systems.

2

Fedora does not look for other linux distros as far as I know.
I suspect it would be a hard problem to merge grub configs from multiple distros.
It only looks for Windows and adds it to the grub menu.