Enable free shipping bar and change target price

Open theme settings by clicking "Customize" button on the theme list

Click on the "global settings" from the left icons

Retro Shopify premium theme - Slash themes

Click on the Cart Goal settings

Under this, you will find All the settings

You can enable or disable to hide from the drawer and cart page as well

You can set price as per your need and change the appearance of the free shipping bar.