According to the web page for Krita, it is a raster editor program. Inkscape is a vector editor program and the two files are of different construction/composition.
You can, however, export your work as a PNG and select the entire document or individual components to be saved. PNG is a raster format and will be accepted by Krita.
The PNG export is in the file menu in Windows, not sure on the Mac version.
Additional research presents this gem from the Krita document page:
While you can open up SVG files with any text-editor to edit them, it
is best to use a vector program like Inkscape. Krita 2.9 to 3.3
supports importing SVG via the add shape docker. Since Krita 4.0, SVGs
can be properly imported, and you can export singlevector layers via
Layer ‣ Import/Export ‣ Save Vector Layer as SVG… menu item. For 4.0,
Krita will also use SVG to save vector data into its internal format.
Post install notes.
I downloaded the current 4.2.9 version and loaded a couple of SVG files. The first one did not appear, while the second one did. I had created both of these original SVG files and the only significant difference is that one of them had the objects in the drawing outside of the document boundaries. Once I adjusted document properties accordingly, both SVGs open, as vector files in Krita.
If you don't have a current version, that may be a factor, but you can also check your SVG object locations in a number of ways. I'm not a code-monkey, so I can't read the direct code. It's easier for me to open Inkscape and adjust there.
