I did new Install Manjaro. Now appears an old Problem, grub Install. I found efibootmgr ans tried to change the Sequenz of booting. With Operator -o. But the new Sequenz does Not appear and Not store
If you do not give more details about what you want to do and what you get, i am afraid nobody could help you.
Also give information about your system, there are guides here which indicate you how to do so.
Where ? in a terminal, at boot, in your UEFI…?
I have always managed to restore or/and change my UEFI entries with Efibootmgr when they had been erased
Well, just change the boot order from the uefi itself. I also had this once, no idea why, i guess the uefi was autogenerating entries on next reboot.