Your product may be ranked last in AliExpress search due to the following reasons: fierce competition, too many similar products lead to lower ranking;

Poor quality of product description and pictures affect user click-through rate and purchase intention;

Low store reputation and lack of trust;

Not competitive enough in price, more expensive than similar products.

It is recommended that you optimize product description and pictures, improve store reputation, adjust pricing strategy, and increase publicity efforts to improve product ranking and sales.