QFileDialog's name filter case sensitivity is not clear

https://doc.qt.io/qt-6/qfiledialog.html has a lot examples for name filters like

fileName = QFileDialog::getOpenFileName(this,
    tr("Open Image"), "/home/jana", tr("Image Files (*.png *.jpg *.bmp)"));

However, when using this code, the result is different between platforms: Windows and KDE treat those as case-insensitive but GTK and xdg-desktop-portal treat them as case-sensitive. Files like IMAGE.JPG are hidden in the dialog.

The portal even has the following in its documentation:

The first string is a user-visible name for the filter. The a(us) specifies a list of filter strings, which can be either a glob-style pattern (indicated by 0) or a MIME type (indicated by 1). Patterns are case-sensitive.

To match different capitalizations of, e.g. '*.ico', use a pattern like: '*.[iI][cC][oO]'.

Example: [('Images', [(0, '*.ico'), (1, 'image/png')]), ('Text', [(0, '*.txt')])]

https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.freedesktop.portal.FileChooser.html

GTK3 doesn't document case sensitivity but GTK4 does:
https://docs.gtk.org/gtk3/method.FileFilter.add_pattern.html
https://docs.gtk.org/gtk4/method.FileFilter.add_pattern.html
Both are case-sensitive on Linux in fact, though.

I believe Qt has either to handle the case sensitivity converting patterns like *.jpg into *.[jJ][pP][gG] or make it clear in the documentation that the patterns are case sensitive and convert the examples of filters in the documentation from Image Files (*.png *.jpg *.bmp) to Image Files (*.[pP][nN][gG] *.[jJ][pP][gG] *.[bB][mM][pP]) so that application authors don't get caught by this difference.