Berryboot or alternatives request

Hi! I’m fairly new to banana pis. I bought myself a BPI-M2+. I downloaded RetrOrangePi, but I want to dualboot it with a blank armbian too for different purposes. I heard that you can use berryboot with the m2+, but I can’t find an image for it. Does it still exist? If not are there any alternatives? Thanks.

Doesn’t RetroOrangePi already provides an option to boot Armbian?

Yeah it can, but it would be nice if I could dualboot with othe os-es. It was just an example(a bad one xd) I actually want to dualboot with that plex os