How to I add another entry to grub?

I have 3 os’s installed on my computer, Windows, EndeavourOS, and Kali. However, when I install Kali, only Windows and Kali show up. How do I add Endeavouros?

os-prober returns /dev/nvme0n1p1@/EFI/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi (on kali).

The output of sudo update-grub is

Generating grub configuration file ...
Found theme: /boot/grub/themes/kali/theme.txt
Found background image: /usr/share/images/desktop-base/desktop-grub.png
Found linux image: /boot/vmlinuz-6.10.9-amd64
Found initrd image: /boot/initrd.img-6.10.9-amd64
Found linux image: /boot/vmlinuz-6.8.11-amd64
Found initrd image: /boot/initrd.img-6.8.11-amd64
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Found Windows Boot Manager on /dev/nvme0n1p1@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for UEFI Firmware Settings ...
done

(os-prober and update-grub don’t help)