There may be several reasons for the lack of product highlights in the product selection square:

1. The product does not meet the standards of Douyin Product Selection Square: Douyin Product Selection Square has certain review standards for uploaded products, and only products that meet the standards can be displayed. If your product does not meet these standards, it may be excluded from the product selection square.

2. The product has not been certified by the enterprise: Some product categories require enterprises to be certified before they can be displayed in the product selection square, such as automotive supplies. If you do not have enterprise certification, your product may not appear in the product selection square.

3. The product has not been added to the Selected Alliance: To display the product in the product selection square, you need to add it to the Selected Alliance first. You can add the product to the Selected Alliance through the Marketing Center-Juliang Baiying-Selected Alliance-Ordinary Plan-Add Product Path in the Doudian backend.

4. The product is ranked low: In the product selection square, the ranking of the product will affect its exposure. If your product is ranked low, users may not be able to see your product when browsing. You can try to optimize the product title, description, pictures, etc. to improve the product ranking.

5. The product category is not popular: Some product categories have high attention and fierce competition, and products are more likely to be exposed in the selection square. If your product category is relatively unpopular, you may need to increase the exposure of the product through other means.

In summary, in order to make the product stand out in the selection square, you need to ensure that the product meets the standards of the Douyin selection square, obtain corporate certification (if necessary), add it to the selected alliance, improve the product ranking, and choose a popular product category. By optimizing the relevant information of the product, you can increase the exposure of the product in the selection square.