With the Schema Editing Access extension, we can enable to grant non-admin users access to create and manage endpoints.
Decide what users can edit the schema by selecting the appropriate configuration from the dropdown in the "Plugin Configuration > Schema Editing Access" tab on the Settings page:
Users with capability: "manage_graphql_schema"
Users with role: "administrator"
Users with any role: "administrator", "editor"
Users with any role: "administrator", "editor", "author"