I do not know what this has to do with Qt6 other than that QtWebKit is not even an option on Qt6. Sometimes one has to move when you are downstream others giving up on projects. QtWebKit was already known not to be maintained in the buster release.
- Bug#1093301: python3-qgis: Get rid of python3-pyqt5.... Bastian Germann
- Bug#1093301: [DKIM] Bug#1093301: python3-qgis: ... Sebastiaan Couwenberg
- Bug#1093301: [DKIM] Bug#1093301: python3-qg... Bastian Germann
- Bug#1093301: [DKIM] Bug#1093301: python... Sebastiaan Couwenberg
- Bug#1093301: [DKIM] Bug#1093301: py... Dmitry Shachnev
- Bug#1093301: [DKIM] Bug#109330... Sebastiaan Couwenberg
- Bug#1093301: [DKIM] Bug#109330... Bastian Germann
