how to import installed packages into a CMake project

[ac169]

Total install time: 549 us
The package fmt provides CMake targets:

    find_package(fmt CONFIG REQUIRED)
    target_link_libraries(main PRIVATE fmt::fmt)

    # Or use the header-only version
    find_package(fmt CONFIG REQUIRED)
    target_link_libraries(main PRIVATE fmt::fmt-header-only)

most packages have the above prompt to import the CMakeLists.txt file after installation, while a small number of packages do not have this prompt after installation. So how to import such packages, for example: vcpkg install wepoll:x64-windows

Computing installation plan...
The following packages are already installed:
    wepoll:[email protected]#3
wepoll:x64-windows is already installed

find_package(wepoll REQUIRED)

By not providing "Findwepoll.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "wepoll", but
  CMake did not find one.

  Could not find a package configuration file provided by "wepoll" with any
  of the following names:

    wepollConfig.cmake
    wepoll-config.cmake