I'm trying to change the icon size of a DockWidgetTab to something larger using either code or preferably stylesheets. It seems that the size is locked as my attempts to change it via a stylesheet didn't work. It seems they are set to a fixed size:

d->IconLabel->setPixmap(Icon.pixmap(style()->pixelMetric(QStyle::PM_SmallIconSize, nullptr, this)));

Here is an example image of the icons I want to enlarge.

Is it possible to change the icon size somehow?