Router to Subgraph Request using GET instead of POST

Help
,
1

How can my Apollo router make GET requests to subgraph instead of POST? Based on my benchmark, GET outperforms POST. But it only happens between the client & the router. I want to improve the network performance by making GET requests from the router to the subgraph instead of POST.

the yaml

federation_version: =2.0.1
subgraphs:

  product:
    method: GET // does not work
    routing_url: http://localhost:8081
    schema:
      file: ./subgraphs/product.graphql