That user was me!
I was following your instructions.
I had to convert from MBR to GPT (for a reason that I don’t know, system was on MBR…)
(in the following update the efi-boot partition was not mounted because I restarted, but I tried with it mounted)
lsblk -f  ✔
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
loop0
squash 4.0 0 100% /run/miso/sfs/livefs
loop1
squash 4.0 0 100% /run/miso/sfs/mhwdfs
loop2
squash 4.0 0 100% /run/miso/sfs/desktopfs
loop3
squash 4.0 0 100% /run/miso/sfs/rootfs
sda
└─sda1
ext4 1.0 HD 0730390f-64f7-4722-8644-0b147af0a682
sdb
├─sdb1
│ ext4 1.0 d6ecda09-ff35-416a-9f44-94f281802154
├─sdb2
│ vfat FAT32 39B8-499E
└─sdb3
swap 1 swap a95fd9bf-e175-4a17-8c3c-91e6b1210744
sdc
└─sdc1
ext4 1.0 SSD-VMS 0a8dbb6f-1615-4fe7-869d-f847134b304d
sdd
├─sdd1
│ │ exfat 1.0 Ventoy DCDE-6DE2
│ ├─ventoy
│ │ iso966 Jolie MANJARO_GNOME_251RC1 2025-12-23-13-49-03-00 0 100% /run/miso/bootmnt
│ └─sdd1
│ exfat 1.0 Ventoy DCDE-6DE2
└─sdd2
vfat FAT16 VTOYEFI 3105-B091 4.6M 86% /run/media/manjaro/VTOYEFI
My system is on sdb (system, boot-efi and then swap)
and on manjaro-chroot -a
[manjaro-gnome /]# mount /boot/efi
mount: /boot/efi: can't find in /etc/fstab.
Looks like /etc/fstab is not point to right place.
The correct step by step should be this one?
After making a partition for swap and EFI:
sudo mkfs.fat -F 32 /dev/sdb2
sudo mkdir /boot/efi
sudo mount /dev/sdb2 /mnt/boot/efi
sudo manjaro-chroot /mnt /bin/bash
sudo grub-install --target=x86_64-efi --efi-directory=/boot/efi
Is that correct?
A GParted screenshot of my system:
EDIT:
Now it is moving on!
But, when I run lsblk -f /dev/sdb2 the output is
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
sdb2 299.2M 0% /boot/efi
There is no UUID to add on /etc/fstab
How can I add the UUID to /etc/fstab?
My /etc/fstab:
# <file system> <mount point> <type> <options> <dump> <pass>
UUID=d6ecda09-ff35-416a-9f44-94f281802154 / ext4 defaults,noatime 0 1
UUID=b1b7c693-1d50-44de-b647-e3f032335bfa swap swap defaults,noatime 0 0
tmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0
/dev/disk/by-uuid/0730390f-64f7-4722-8644-0b147af0a682 /mnt/0730390f-64f7-4722-8644-0b147af0a682 auto nosuid,nodev,nofail,x-gvfs-show 0 0
/dev/disk/by-id/wwn-0x5001b448b0f9e4ef-part1 /mnt/wwn-0x5001b448b0f9e4ef-part1 auto nosuid,nodev,nofail,noauto,x-gvfs-show 0 0
/dev/sdc3 /mnt/sdc3 auto uid=1000,nosuid,nodev,nofail,x-gvfs-show,noauto 0 0
/dev/disk/by-id/wwn-0x50014ee211983dcd-part1 /mnt/wwn-0x50014ee211983dcd-part1 auto nosuid,nodev,nofail,noauto,x-gvfs-show 0 0