App block that generates Pickup Points in the checkout is available only to stores on a Shopify Plus plan.
Tutorial: How to add App Block
From your Shopify admin, go to Settings > Checkout.
In the Configurations section, click Customize next to the checkout configuration that you want to customize.
In the checkout and accounts editor, select the Checkout page and then click the sections icon to access the Sections sidebar.
Click ⊕ Add app block in Delivery section
Enable Allow app to block checkout. Without this function, the customer can finish the checkout without selecting a pickup point.
Click Save.
Add the same app block to Order Status page and Thank You page. This block displays the selected Pickup point.
Test pickup points in the Checkout page
Button for Select from map will be automatically enabled, when you add the Google Maps API key to the Shipping settings in our app. How to add and register Google Maps API key
It is important to add app blocks to checkout and post checkout pages (Order Status and Thank You).