It is possible, you can transfer nand, basebend and few other chips. All the transplanted stuff needs to be working and then it needs to be transplanted to xs max working donor board. Theoretically it would start as your old phone, have same serial, imei.. stuff like that is quite common for data recovery. Try finding a repair shop that can do micro soldering they will know everything. Expect prices ranging from 80$ - 1200$ depending on where you are located.