Here's Mozilla's docs on text elements: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/text
SVG text elements need the font:
font-family:Poppins
Try installing Poppins (it has an Open Font License). It looks like Godot has some font system itself, but I don't know much about game engines.
Alternatively, if you don't want to depend on Poppins, you could convert the text elements to a path (but that would be laborious.)