I can't speak for any of these other technologies, but no part of the GraphQL spec requires GET requests to have bodies. The spec is clear about how to use query strings instead.
https://github.com/graphql/graphql-over-http/blob/main/spec/...
https://github.com/graphql/graphql-over-http/blob/main/spec/...
The QUERY method is a step in the right direction but it came too late.