That title is quite literally accurate. We do read about "10 Couples With A Significant Age Difference Share How They Make A Relationship Work"
The couples do have age gaps. They do explain ways of making a relationship work. In fact they explain things relevant to making any couple relationship work, regardless of their being or not being an age gap involved.
There is very little in there of any particular relevance to AGR's.
The first few paragraphs contained hints that there were some special problems to AGR's. None were identified until well into the article when there were finally a few sentences about a couple where one was retired and one at work.
SW