In doing my first port to Kirigami.FormLayout, I'm very impressed so far. It's a nice API to work with. The only issue I ran into was that I had to manually add `anchors.horizontalCenter: parent.horizontalCenter` to get it to be centered, as the HIG prescribes in https://hig.kde.org/patterns/content/form.html. It would be nice if Kirigami FormLayouts centered themselves automatically unless overridden, just to cut down on the amount of boilerplate needed for implementation.
If you do any behavioral changes here make sure to make it consistent with QFormLayout which has always been not centered horizontally for KDE. [1] "Recommended style for KDE applications. Similar to MacStyle, except that the form is left-aligned and all fields grow to fill the available space." [1] https://doc.qt.io/qt-5/qformlayout.html
Hmm, you're right. I see that QWidgets-based ones are also left-aligned. I think this should be changed, but yeah, that needs a discussion first.