Hi Lisandro, I think I misunderstood the Qt documentation myself. It seems the dynamic GLES support is only available on Windows, but the changes in qt6 rendering would still minimize the requirements for rebuilt packages.
It seems that it is only necessary to rebuild libqt6gui6 with "-DINPUT_opengl=es2". Maybe you could make a new source package for Qt6 Base on GLES and make it build libqt6gui6 and only it. For reference, you can take a look at https://github.com/cutie-shell/qt6-base/tree/feature/bookworm/gles_minimal/debian . Note that you would need to use a different package name like libqt6gui6-gles and it should provide and conflict with libqt6gui6. Kind regards, Erik Inkinen