Each operating system will install its own version of GRUB-EFI which will overwrite the previously-installed boot. Repeat the same process for installing Manjaro and PopOS to the “xps-manjaro” and “xps-pop” partitions. The Chimera/Chameleon boot loader should show up with all the partitions on the USB and you PC.
Pop in the USB and make sure to set the BIOS to boot from USB first.
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