EfficientDet topology is not supported by OpenVINO.
For your additional information, the following page, 'Get a Deep Learning Model Performance Boost with Intel® Platforms', contains benchmarks that demonstrate high performance gains on several public neural networks for a streamlined, quick deployment on Intel® CPU, VPU and FPGA platforms.
In that case, I would suggest you validate them on your end. Train your EfficientDet-d2 model in any of the supported framework and try optimizing using Model Optimizer.
More information is available at the following page:
And do share the eventual results for the benefit of everyone in our OpenVINO community.