For some reason, the default QML Image element doesn't scale SVGs like
it should. Essentially, it just reads the source size of the SVG and
scales it like it would a regular image (say PNG).
I'm fixing this by manually setting the source size of the image to the
current size. That said, this is in my opinion a hacky fix and it's
really weird that QML doesn't special-case SVGs and scale them as it
should.
Source:
https://stackoverflow.com/questions/69641034/qml-image-does-not-stretch-fit-svg
ItsDrike