Installed on nvme and only one partition - no EFI !?

[Tiber-Septim]

Gigabyte-B550M-D3SH
Fastboot off.

I am dual booting with Win10, used to be Mint but drawn to EOS by youtube devils
I need to use my boot select key on startup otherwise it boots into my Ventoy stick or Win10.

When I select the nvme with EOS ( nothing else on it ) I get the bootloader menu ie start normally or with advanced options and would like to add win10 ( because programmable keyboards and HOTAS don’t work properly under linux ).
This 1Tb nvme only has one partition on it, I did select the "use entire disk " option when installing.

[andy@Gigabyt-B550M-D3SH ~]$ sudo bootctl
Couldn’t find EFI system partition. It is recommended to mount it to /boot or /efi.
Alternatively, use --esp-path= to specify path to mount point.
System:
Not booted with EFI

Do I need to re-install and do things manually or can I add an EFI partition to my EOS ‘drive’ ?

[Stephane]

you should check all option in your UEFI motherboard

1. create an save a profile for windows
2. for linux , create an another profile , with

secure boot off
fast boot off
csm off
all disks on AHCI

and recheck before reinstall

inxi -Fza
sudo lsblk -fs
sudo parted -l 
test -d /sys/firmware/efi && echo efi || echo bios
sudo efibootmgr -v

[Tiber-Septim]

Thanks but I fixed it by reinstalling and using the installer to completely wipe the drive.
I seem to remember the first time I installed I couldn’t use the “online” option but this time I could.

Not tried adding a dual boot entry yet and maybe I won’t bother, I can always use the boot selector if I’m quick enough.
I also lost my forum login details but Gmail came to the rescue.

Oh!, I made sure to boot the USB stick using the EFI option, maybe that helped.