Often times, missing columns in the reconciliation page can be caused by a stored history on your regular browser that may have been corrupted.
Let's try using a private browser or incognito window as an initial step on fixing this issue. This will eliminate any browser history that may cause a glitch inside QuickBooks. You can refer to the following keyboard shortcuts below:
Google Chrome: Ctrl + Shift + N
Microsoft Edge: Ctrl + Shift + P
Firefox: Ctrl + Shift + P
Safari: Command + Shift + N
If this fixes the issue, then close out the private window and clear the cache on the regular browser. This will remove previously-stored browsing data that might have caused the issue. Otherwise, you can try other supported browsers to help narrow down the cause of this behavior.
To help you with the whole reconciliation process, you can visit the following links below: