Help me dual boot with systemd-boot.

[limber roost]

I'm trying to dual boot pop os and kali linux . POP! comes with systemd-boot, I don't know what and how I am supposed to do things.(I've only ever used grub.) I found this one suggestion from a post in stack exchange which I think will work but I need somebody to explain few steps, especially the last one.

[fickle hazel]

systemd-boot is only able to boot from kernels that are on the same EFI partition or are in an Extended Boot partition