Installed GraphiQL app, but don't know how to change api

Regarding the “2024-04 release notes” (https://shopify.dev/docs/api/release-notes/2024-04), I want to replace “InventoryLevel.available” and “InventoryLevel.incoming” with “InventoryLevel.quantities.”

However, I’m unsure how to access this page. I have installed the GraphiQL app.

Could someone please guide me step-by-step?