Chosen Solution

Does anyone know what the component is in the attached pic? The marking on top is N6. I think it may be related the gas gauge? I can’t find a similar looking component on some of the spare boards I’ve got lying around. I looked near the battery connector on the Air 1 & Air 2 but I don’t see anything that appears similar. I’ve got 3-4 boards all . missing that component and all of them are bootlooping

While there is no schematic for this device, the pad pattern is clearly one of a MOSFET. Based on this, there is a very high probability that using an iPhone 7 / Q2102 MOSFET will do the trick. You can salvage one from a dead board or order them new from DigiKey/Mouser (PN# RV3C002UN).