TVM main branch has removed the Relay frontend. And it is claimed that the Relax Onnx frontend supports all operators that Relay could support: Phasing out Legacy Components - #20 by Hzfengsy
From the code: tvm/python/tvm/relax/frontend/onnx/onnx_frontend.py at 707daef83eed60222b2e4cc38c7292cdf8b217ee · apa
It seems that the parsing of NMS has been commented out, but NMS is supported in the Relay frontend.
Has the Relax ONNX frontend really supported all the operators that Relay could support?