In your dashboard, go to Loyalty > Embedded Blocks > Acquire Points for your product pages.

Upon enabling this setting, you can show your customers the number of points they'll earn from purchasing a specific product.

You can freely change the color of the text and the background here.

After configuring, you need to add Appstle blocks in your store's theme settings so they can be visible to your customers.

To do this, go to Online Store > Theme > Customize > Product page

Then add the Acquire Points block on the product page from the block options.