It definitely doesn’t hurt, although I’m not sure it helps much either. The airlines are interested in your experience and qualifications , and how well you work with others. They’ll tease this out in the interview and depending on the airline will offer you a CJO prior to a background check. Since they’ll be doing their own check anyway, it probably doesn’t matter much.
If you have the space for it, then maybe include it. But considering space can be tight trying to fit everything onto one page, I wouldn’t leave out other pertinent experience just to include it.