Andrew, That article is wrong and if it were right would not help.
Village wants only the document with approved changes, not all changes.
Looking again, though, the last image still shows a change bar.
First, the correct way to copy tracked changes is to have Tracked Changes ON in the donor document, and OFF in the recipient document. The article shows having them turned off in both.
How to Copy Text With Tracked Changes Preserved by Shauna Kelly, MVP
Second, the last image has to do with the display of Tracked Changes, not their presence. This is a local computer setting, not a setting in the document itself.