Qt 6.4.3 or later. The Qt version that you use to build Qt Creator defines the minimum platform versions that the result supports (Windows 10, RHEL/CentOS 8.4, Ubuntu 20.04, macOS 10.15 for Qt 6.4.3).
uses: jurplel/install-qt-action@v4.1.1 This is the host platform of the Qt version you will be installing. It's unlikely that you will need to set this manually if you are just building. For example, ...