An interim clearance may only be granted if the sponsor asks for it, typically at the time they submit the application for clearance. Your sponsor (company) should make it clear whether or not they are putting your application up for an interim eligibility determination or not, but you can always ask your FSO. If you don’t know, your FSO is your contact within the security office who is managing your application.
Even when the interim is requested, it is very often denied. I have often heard it cited that only 70% of applications are granted for interim, while 99% of final clearances are granted. I don’t think this is correct, but the point is that it is harder to get an interim. If there is ANYTHING in your file that needs to be investigated (e.g. drug use, foreign contacts, financial issues), then you shouldn’t be surprised if you aren’t granted an interim. This is especially true for high level clearances, such as the one you presumably applied for.
Sometimes people are granted interims. These people usually have exceptionally clean files. But even squeaky files are sometimes denied interims, and sometimes people who have a bit of color to their file are granted. It’s not deterministic.