To display products on your personal homepage, you can follow the steps below:

Open the Douyin app and log in to your account.

Go to your personal homepage, which can be accessed by clicking the "Me" button in the bottom navigation bar.

In your personal homepage, click the edit button in the upper right corner to enter the edit profile page.

In the edit profile page, find and click the "Product Showcase" option.

In the product showcase page, select "Add Products".

In the add product page, select the appropriate platform, such as "Taobao Alliance".

Follow the prompts to enter the PID and APP KEY of Taobao Alliance to complete the authorization.

Enter the keywords of the products you want to display in the search box and click the search button.

Select the products you want to display from the search results and click Add to Product Showcase.

After adding, these products will be displayed on the profile page of your personal homepage, and other users can browse and purchase these products on your homepage.