eh, the tool seems like it's locked and is only usable for people who work for Nokia only (regarding features like unlocking bootloaders and fastboot mode, I think?). You can't give your phone to them and ask them to unlock the bootloader for your phone, though, because:
1. Nokia's, or rather, HMD's phones (might) all have incomplete bootloaders (even HMD employees cannot unlock them.)
The only ways to open those phones, is to either hack into HMD servers, and get the unlock keys (but as said before, some, if not most or even all, of the phones cannot be unlocked (even with the keys), because HMD decided to use broken bootloaders, not to mention that this way is definitely illegal and/or very expensive and requires a lot of expertise to execute, and if you do have the expertise, you are better off buying something else that is unlockable anyway by legally working for a company and getting paid), or acquire prototype units that are unlockable (Hikari_Calyx sometimes buys prototype/unreleased versions of Nokia phones in order to get some stuff inside the phones, and create tools for unlocking the retail units), so if you ask him, maybe he'll reveal something. Getting those prototypes are extremely hard unless you live in China, though.)
2. Their customer service is just simply infuriating to work with, especially when it comes to bootloader unlocking.
They would just straight up refuse to unlock your bootloader, citing reasons like "security", "safety" and just ignoring the fact that if you're asking them something like that, it (probably) means that you are knowledgeable enough to know what you're doing and blah blah blah.
