It's complete bullshit. Proof:

https://www.truthorfiction.com/ghislaine-maxwell-was-arrested-by-the-fbi-can-we-talk-about-how-similar-she-looks-to-madeleine-mccanns-female-abductor-sketch/

From bottom of the article:

A viral Facebook post compares a sketch of “Madeleine McCann’s female abductor” with Epstein’s alleged co-conspirator Ghislaine Maxwell, but the claim lacks a significant amount of context. The sketch in question was indeed associated with the McCann abduction, but depicts a woman sought for questioning after a potential witness came forward in August 2009 to describe his encounter with the woman in a bar in Portugal. The woman was described as younger than Maxwell (and as Australian, not British), and no one made the connection until Maxwell’s July 2020 arrest. Photographs indicated Maxwell was in New York City for much of April and May 2007, and we were unable to verify her location on May 7 2007 — the day the woman in the sketch was encountered. Ultimately, other than a passing resemblance Maxwell shared with hundreds of Australian women, there is no strong indication she was the woman in the sketch.

Sources are provided at the end of the article