Hi Stephanie,
Thanks for your patience on this issue. The team took a deeper dive into this and we think we found the issue. The reason you don't see the layer in the table of contents and unable to perform an extract likely comes from the table of contents not being open when layers are added. If you come across this situation where you added a layer and the table of contents displays no layers I recommend trying the following.
1. Open a new AutoCAD drawing while having the original drawing still open
2. Switch to the new AutoCAD drawing.
3. Switch back to the original AutoCAD drawing where the layers were added.
The act of switching between drawings should be enough to trigger the Table of Contents to refresh. Once that happens you will see the menu options to extract the layers once again. The team is currently working on a fix for this issue so you no longer have to perform the workaround.