I guess there is quite a range in what she'd be capable of depending on the standard of rehabilitation she's recieved and if it's below/above the knee and why she needed it amputated in the 1st place..
An otherwise healthy younger person with good rehabilitation, no underlying health conditions and a standard prosthetic can get to the point they can walk hundreds of metres in one go.
https://www.researchgate.net/publication/7912879_Claimed_walking_distance_of_lower_limb_amputees
Even then dragging/carrying 30kg or your average 10 year old across the ground for any distance I imagine would be extremely challenging even for even good outcomes.
The fact IA is seen as a care giver would suggest she's not on the better side of outcomes to me. Struggling in that case to see how she'd potentially be able to pull it off without the involvement of a 3rd party if the local area has been searched thoroughly.
JMO.