No specific advice but since the 4K monitor has become more common for private use there have been issues due to the pixel size being so much smaller than that on the older 1080P monitor.
If you are using a high resolution display you may have to set the output resolution to a lower one than the default, or even set it to the default and then use OS settings to magnify the system items to be more easily seen. Windows has a multiply factor in the setup screens . Try figures between 250% and 300%, but this can be a little hit and miss currently
Windows also has the functionality built in to automatically rescale apps that are specifically written for the screen size variations and there is also a setting that allows you to set different magnification rates on an App basis
There may be a setting in Bootcamp that is causing your issue Not a MAC user so can't help with specifics but check the defaults for monitor resolution and if this is defaulting to 4K then this could cause your issue