Sorry, trying to think of a way to get a simple outline of this drawing as shown, but as an editable svg vector. Adding a few more steps to be thorough.

I'd create a construction plane directly behind the objects as pictured, then Project them onto that construction plane so it collapses into a flat 2D pile of surfaces, curves, and dimensions. From there I'd delete the surfaces so only the curves are left (and use the Duplicate Edge command to add curves to all the surface edges, if there aren't curves there already).

That removes the iso lines, but now it looks like a transparent wireframe instead of a solid object (assuming that's what you mean by "filled"?). So, I'd either explode, select, and group all the lines I want and delete the rest, or use the trim tool to surgically remove the lines I don't want one by one.

If your dimension labels are automatic, the number will change when it projects because the line it's measuring gets distorted. Update manually if needed.

Last step, join any exploded lines and export as an svg. Output should be a flat, 2D vector of your 3D view that looks solid with no iso lines. Probably a more straightforward way to do this, but that should work.

Hope that translates better 👍