Hello there, PR ACCT.
Thanks for sharing the steps you've done so far to resolve this issue with missing Item section n QuickBooks Desktop (QBDT). I want to make sure this is taken care of.
Since none of the steps provided above works, you can try verifying and rebuilding your QuickBooks software to fix common data issues and unexpected behavior within your company file.
Before you proceed with the troubleshooting, please secure a backup of your company. Once done, you can now start to verify and rebuild your QuickBooks.
Here's an article that'll serve as your step by step guide in resolving common data damage on your company file: Verify and Rebuild Data in QuickBooks Desktop.
If it does the same thing, you may need to get in touch with our QuickBooks Desktop Support for further investigation. Here's how you can reach them:
There you have it. Let me know how it goes or if you have follow-up questions about this. I'd be glad to answer them for you.