Adding images to PySide6 applications, using QLabel and QPixmap
Briefly

Since you're wanting to insert an image you might be expecting to use a widget named QImage or similar, but that would make a bit too much sense! QImage is actually Qt's image object type, which is used to store the actual image data for use within your application. The widget you use to display an image is QLabel.
As you can see, the image is inserted, but the image is kept at its original size, cropped to the boundaries of the QLabel box. You need to resize the QLabel to be able to see the entire image.
Read at Python GUIs
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