Does anyone have any experience with Bin Numbers which are under the Inventory Detail Tab but not under the Purchasing/Inventory Tab on an Item Record? I'm not sure how best to go about resolving this issue.

see if Bin Putaway Worksheets help you https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_N2274903.html

What is the issue? You want the bin numbers to show on a different tab?

I figured it out. Poorly mislabeled sublists but one is the Associated Bins you would typically find as a filter option when selecting inventory detail on a transaction.