5GHz capable drivers for BCM94360CS on Windows 7
The problem is that you're looking for drivers for a wireless adapter that was pretty much only on Apple devices* for an Operating System that reached End of Mainstream Support January 15th, 2015.  It went completely EOL (End of Life) in January of 2020.
Your 2015 MacBook Pro was literally released the same time, if not shortly after Windows 7 was deprecated for Windows 8.  Apple, nor Microsoft were going to spend development cycles writing a driver for it - this is why it's so rare.
Supposedly, Boot Camp 6 drivers might work for you.  However, there's no tweaking of INF files that will increase throughput - that's a function of how the driver was written.  INF files are what describe to the Windows installer what the driver name and location is, the device name and location, and what registry options to be added/modified during install.  None of it &quot;fixes&quot; a problematic driver.
I understand that Windows 7 is critical for you, however, it's odd that a school would require you to utilize a tool that only runs on an OS that's been dead for 5 years now.  Your next option would be Windows 8, which might have better compatibility.  Windows 10 does have Compatibility Mode which allows older software designed to run on Windows 7/8 to run on Windows 10.
Now, if this is something you've personally decided that you only want to run Win7 and/or this particular application, then you'll need to make some compromises on your end as it's extremely unlikely you'll see any development on this driver for Windows 7.
Finally, your last option is to run the App in a VM rather than in Boot Camp.  As it runs in virtualized environment with virtualized network adapters, you won't have any compatibility issues with respect to drivers.

* https://deviwiki.com/wiki/Broadcom_BCM94360CS