Only for paid plans by the looks of it [1]
It took a while to figure it out as you can create a SVG object but can't import a file and there's nothing matching "import" in the docs.
What a weird decision. Testing the software whether it would correctly work with my assets is probably the most important purpose of the trial version.
edit: I've been corrected below
1 - https://www.construct.net/en/animation-software/manual/proje...