@Atiya
Welcome to the Win-Raid Forum!
There is no need to extract the *.BST file. It can be opened and modified by any AMI UEFI BIOS Modding tool after having changed the file category to “all files”.
>Here< is the Guide about how to get the NVMe module properly inserted.
If you have any additional questions regarding the BIOS modding procedure, please post them into the linked thread.
Good luck!
Dieter (alias Fernando)