If a project doesn't appear as a folder in Finder, check these points in order.
1. Is it selected?
Open Settings → Docs & Files and confirm that the project is checked. If it isn't, check it and wait a few seconds for its folder to appear.
2. Try unchecking and checking again
If it's checked but doesn't appear, uncheck it, wait for it to disappear, and check it again. This forces Companion to rebuild its folder in Finder.
3. Give large projects a moment
A project with a lot of content may take a few seconds to list the first time. Enter the folder and wait for it to finish loading.
4. Check the Finder extension
Confirm that the extension is enabled (see "What permissions Companion needs and why").
Note: if the project does appear in the Launcher but not in Finder, it's a sign that the issue is on the Finder extension side, not your session.