How to set stylesheet for the current item in QTableView

Qt style sheets support sub-controls and pseudo states, you can use it to improve your customization. see Qt6 docs

In this case you can use the ::item sub-control and the :focus pseudo state (the “current” pseudo state doesn’t exist, but the :focus does the same).

This is an example that you can use:

QTableView::item:focus
{
   selection-background-color: yellow;
}

See also Qt6 documentation of customizing a qtableview