hello and welcome !
have you tried it like this and it hasn’t worked for you ?
sudo dd bs=4M if=/path/to/bootable-os.iso of=/dev/sd(insert-drive-letter-here) status=progress oflag=sync
i suppose the CLI has it’s appeal but from the GNOME environment you can use ‘Disks’ to make bootable usb devices with ‘restore-image’ from the menu on the top-right side of the GUI window. this method also works for making external usb connected SATA based SSDs bootable. i have not had issues with it so far.