The biggest thing is likely the update to PyQt 6. Some things have moved around in terms of namespace. There is a utility tool: https://github.com/qgis/QGIS/wiki/Plugin-migration-to-be-compatible-with-Qt5-and-Qt6 ``` pyqt5_to_pyqt6.py /path/to/plugin ``` I don't foresee big changes otherwise.
The biggest thing is likely the update to PyQt 6. Some things have moved around in terms of namespace.
There is a utility tool: https://github.com/qgis/QGIS/wiki/Plugin-migration-to-be-compatible-with-Qt5-and-Qt6
I don't foresee big changes otherwise.