Is there a way to boot from EMMC while sdcard is inserted

Banana Pi SBCs design BPI-M2 Ultra / BPI-M2 Berry(A40i)
1

I want to use SDcard as storage (I have a 200GB SanDisk), but my m2u get to a boot loop when an empty sdcard is inserted. After Google search then read some post, I tried some methods but no help.