As Manjaro for ARM doesn't (yet) come with an installer or live DVD (but only on a generic EFI image, in our case), there are some extra steps to do; as well explained here (and don't forget to install GRUB to the EFI directory, before rebooting): https://dev.to/yuizumi/installing-manjaro-on-parallels-with-apple-silicon-e6k Not that difficult, after all...
... BTW, as also explained in the article, the most recent images (Manjaro 25+) are here: https://github.com/manjaro-arm/generic-efi-images/releases