Make sure your program has the latest version. If not, kindly update your software in Reallusion Hub and then reopen the program:
Once done, click the "Refresh" button at the top right of the Smart Content Manager to refresh your content state.
You can also use the "Sync Installed Asset..." option in the Smart Content Manager's right-top menu to sync your content.
After this, try to search for your content under the Template's "Pack" tab for all packs, and also the "Item" tab for all items.
Important Note: In Smart Content Manager's menu, make sure "All" is selected.