Qt5 is preferred over Qt6 when searching for one of them.

Consider this example (recommended by Qt in https://doc.qt.io/qt-6/cmake-qt5-and-qt6-compatibility.html#supporting-older-qt-5-versions )

cmake_minimum_required(VERSION 3.16)
project(test CXX)
find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core)
message("QT_VERSION: ${QT_VERSION}")

On MINGW I get:

$ cmake --version
cmake version 3.23.2

CMake suite maintained and supported by Kitware (kitware.com/cmake).
$ cmake -B build/ucrt
-- Building for: Ninja
-- The CXX compiler identification is GNU 12.1.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: D:/Programs/msys64/ucrt64/bin/c++.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
QT_VERSION: 5.15.4
-- Configuring done
-- Generating done
-- Build files have been written to: D:/dev/Bugs/cmake_code/build/ucrt

and on Ubuntu 22.04 I get:

$ cmake --version
cmake version 3.22.1

CMake suite maintained and supported by Kitware (kitware.com/cmake).
$ cmake -B build/wsl-22
-- The CXX compiler identification is GNU 11.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
QT_VERSION: 5.15.3
-- Configuring done
-- Generating done
-- Build files have been written to: /mnt/d/dev/Bugs/cmake_code/build/wsl-22

Putting Qt5 first doesn't change anything.

If I remove Qt5 from the searched NAMES then CMake finds Qt6 successfully.

If I understand well (and according to Qt docs) the first name should be searched first.