In fact, unless it has just started to bother your daughter, otoplasty could have been done before she started grade school and suffered teasing by classmates. But at 10, if she is eager and motivated to proceed with corrective otoplasty, she may be a candidate for local anesthesia (which usually isn't possible for the 5-6 year-old).
I routinely do these under local anesthesia for this age group and allow them to select the operating room music and talk or ask questions during the operation! Most do just great and are proud they did the surgery that way!
Night-time head band, hair band, or sweat band (for guys) protected by a slick shower cap, rain bonnet, or hair roller cap to keep the band in place during natural head movements during sleep keeps the ears is their proper position as things heal durably. During the day no band or anything is required, so the child looks absolutely normal when around others! The band at night is worn for a month; sutures are out in a week to 10 days, and problems or complications are quite rare.
Go for it, and good luck!