Could you please trim your emails of unnecessary text!
U-Boot 2021.04 (Apr 28 2021 - 00:00:00)
U-Boot TPL 2021.04 (Apr 21 2021 - 00:00:00) Channel 0: LPDDR4, 50MHz BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB Channel 1: LPDDR4, 50MHz BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB 256B stride lpddr4_set_rate: change freq to 400000000 mhz 0, 1 lpddr4_set_rate: change freq to 800000000 mhz 1, 0 Trying to boot from BOOTROM Returning to boot ROM...
U-Boot SPL 2021.04 (Apr 21 2021 - 00:00:00 +0000) Trying to boot from MMC2
U-Boot 2020.10-1 (Oct 14 2020 - 10:43:46 +0000) Manjaro ARM
Yep, so you probably need to disable the EMMC because it's loading it from the EMMC for some reason.
If it loads to Fedora you can also run "dd if=/dev/zero of=/dev/mmcblkX bs=1M count=10" (update the mmcblkX to the right one) to zero out the beginning of the EMMC if you don't care about the contents of it.