Lieutenant Maggie Chan was a Starfleet officer who served during the early 25th century. In 2401, Chan served on the USS Titan-A's beta shift. (PIC: "The Next Generation")
This character was only mentioned in writing. They were listed on an illegible duty roster in "The Next Generation" which was later shared by Bill Krause on Twitter. [1]
Maggie S. Chan was a member of the costume department on Star Trek: Picard and the namesake of this character.