“The Greatest Love Story Never Told” when the Bronx-born diva questions just how much the public might care about her — and her much-hyped comeback album “This Is Me… Now” — in today’s pop landscape.After all, it has been 10 years since Lopez’s last studio LP, 2014’s “A.K.A.” — and a whole 22 years since 2002’s “This Is Me… Then” gave her two of her biggest hits in “Jenny from the Block” and “All I Have.” “I didn’t even have to make the record,” says Lopez, 54, in the doc, which premiered on Prime Video Monday night.“It’s not like anybody was clamoring for the next J.Lo record, you know what I mean?”Well, damn, she was sure right about that.Despite a major promotional campaign — including a star-studded short film, “This Is Me… Now: A Love Story,” that accompanied the album release — Lopez’s ninth studio LP made an absolutely abysmal debut on the Billboard 200 at No. 38.Just to put that into perspective, seven of the singer’s previous studio albums debuted in the Top 10 — with 2001’s “J.Lo” opening all the way up at No.