Compatibility with drupal/graphql:4 [#3379265] | Drupal.org

From the GraphQL 4 module site:

Differences to the 4.x version: the 3.x version automatically generates a GraphQL schema from Drupal entities and data structures. It exposes Drupal details over the GraphQL API. The 4.x version leaves the GraphQL schema design to the developer, which makes it easier to hide Drupal internal details.

So as with Version 4 you anyway have to implement your own schema it doesn’t make sense to use this module. However there is a module which provides a schema for GraphQL Version 4, see www.drupal.org/project/graphql_compose