1- Shopping Experience: Go to the block category and select the dropdown of text and image

2-  Now drag the Instagram widget and drop it to the left side in the CMS section you want.

3- After dropping the widget: Click the setting icon to open the element configuration

4- In element configuration: you can add the title, subtitle, username, and access token

5- After that: You can also change the heading, username, and subtitle color

After saving the configurations of the CMS page, this block will be visible in the storefront at the respective layout.