I noticed the [object Object] in the top left corner in a few SVGs that I tried.
Here is a great link for anyone learning about SVG’s and how they can be sized and how to edit them to make them behave the way you might want.
All SVG’s are not equal and depending on what app created them and what decisions were made during the export, then they can be very different from one or another.
I use Autodesk Graphic for the build of my SVG creation butt that does add a height and width to the SVG when exported. That can be a very useful thing ofr may need text editing if you want to scale it larger than the original canvas size. Alternatively you can just export it at a huge size (e.g. 10000px high) so it will never reach it’s max size.
Affinity Designer is really good too for exporting SVGs but make sure you convert any text to curves.
Those auto SVG converter apps that convert jpg or bmp images to SVG are the worst at creating good SVGs.