Does the docker image nvcr.io/nvidia/deepstream:5.0.1-20.09-triton support models optimized with TensorRT 7.2.2?
No, you need to use the TensorRT 7.0.X because dGPU DS wraps TensorRT 7.0.X
https://docs.nvidia.com/metropolis/deepstream/dev-guide/text/DS_Quickstart.html#dgpu-setup-for-ubuntu
Ubuntu 18.04 - GStreamer 1.14.1 - NVIDIA driver 450.51 - CUDA 10.2 - TensorRT 7.0.X