Thanks for sharing your concerns in the QuickBooks Community page, @Bravura
The reimbursement won't be included on 1099-NEC as long as the account you used for tracking it isn't marked as checked when preparing your 1099s.
For your second concern, you can select any detail types when creating an account. If you want it to be tracked on 1099-NEC, make sure its box is checked during the preparation of your 1099s in QuickBooks.
Please see the screenshot below as your reference:
You might find this article helpful to get more information about managing 1099s:
Just let me know if you have any other 1099s questions in mind. Simply add the on this thread and I'll get back you. Have a good one.