Did you create a MBR/Intel partition table?
The other one,GUID partition table,is only supported by some legacy BIOSes,but not all of them.
Formatting the whole drive as BFS rather than creating a partition table with one large partition is also something you can technically do,but doesn’t boot,so that could be another possible mistake.
Did you mark the partition as “Active”?
Did you install the bootloader?
That can be done by “write boot sector” in one of the drop down menus in the Installer.