QtPlatz 4.0 and later versions require C++14/17 complient compiler, so that Visual Studio 2017 is required.
Process overview;
Open "x64 Native Tools Command Prompt for VS2019" from Windows Start Menu
cd <qtplatz-source-dir> .\bootstrap.bat[Automatically take you to build-x86_64\qtplatz.release dir]
[Open qtplatz.sln from VS2019, and build it]