The imported edges are only 4mm across. Do these steps:
Zoom Extents. That will be enough for you to just see the object.
Press S, or choose the Scale tool.
Drag one of the hard to see scale handles, by any amount.
Type 1000 and then press Enter.
You will now have a version that is 4 meters across.
When you do more imports, in the Configure dialog turn off the preserve origin option, and change the units to be something other than Model Units.