A 2015 MBP does not have USBc. It has TB2 ports. Can you Identify your MacBook Pro model - Apple Support?
Assuming the MBP is a 2016 Model, you should check the current available to enable the mouse. In case of macOS, look at About This Mac -> System Report -> USB and check the USB bus. It will look similar to
On a 2011 Mini...
USB 2.0 Bus:
Host Controller Driver: AppleUSBEHCIPCI
PCI Device ID: 0x1c26
PCI Revision ID: 0x0005
PCI Vendor ID: 0x8086
Hub:
Product ID: 0x2513
Vendor ID: 0x0424 (SMSC)
Version: b.b3
Speed: Up to 480 Mb/sec
Location ID: 0xfd100000 / 1
Current Available (mA): 500
Current Required (mA): 2
Extra Operating Current (mA): 0
Built-In: Yes
Keyboard Hub:
Product ID: 0x1005
Vendor ID: 0x05ac (Apple Inc.)
Version: 96.15
Serial Number: 000000000000
Speed: Up to 480 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0xfd130000 / 3
Current Available (mA): 500
Current Required (mA): 300
Extra Operating Current (mA): 0
Apple Optical USB Mouse:
Product ID: 0x0304
Vendor ID: 0x05ac (Apple Inc.)
Version: 1.10
Speed: Up to 1.5 Mb/sec
Manufacturer: Mitsumi Electric
Location ID: 0xfd133000 / 5
Current Available (mA): 500
Current Required (mA): 100
Extra Operating Current (mA): 0
Apple Keyboard:
Product ID: 0x021d
Vendor ID: 0x05ac (Apple Inc.)
Version: 0.70
Speed: Up to 1.5 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0xfd132000 / 4
Current Available (mA): 500
Current Required (mA): 20
Extra Operating Current (mA): 0
On a 2018 Mini...
Keyboard Hub:
Product ID: 0x1005
Vendor ID: 0x05ac (Apple Inc.)
Version: 96.15
Serial Number: 000000000000
Speed: Up to 480 Mb/s
Manufacturer: Apple Inc.
Location ID: 0x14300000 / 2
Current Available (mA): 500
Current Required (mA): 300
Extra Operating Current (mA): 0
USB Optical Mouse:
Product ID: 0x2510
Vendor ID: 0x093a (Pixart Imaging, Inc.)
Version: 1.00
Speed: Up to 1.5 Mb/s
Manufacturer: PixArt
Location ID: 0x14330000 / 4
Current Available (mA): 500
Current Required (mA): 100
Extra Operating Current (mA): 0
Apple Keyboard:
Product ID: 0x021d
Vendor ID: 0x05ac (Apple Inc.)
Version: 0.70
Speed: Up to 1.5 Mb/s
Manufacturer: Apple Inc.
Location ID: 0x14320000 / 5
Current Available (mA): 500
Current Required (mA): 20
Extra Operating Current (mA): 0
If you connect a different USB device to the Keyboard hub in Windows, does it work?
