Hey Robert,
Thanks for the support. Your suggestion made me figured out eMMC was not being found. That was because I was using a device tree so I uncommented enable_uboot_overlays=1, then this was disabling the eMMC, so I just picked the device tree overlay that enables it and done, I can see it now.
After fixing it and running sudo beagle-flasher, it worked nicely.
Thanks so much