how to use nms when i use export.py to export onnx

[jifeng632]

when i use export.py to export onnx model, i found there's no nms
but after i tried export.py with --nms the exported model
still need to write nms when use the onnx model

these models
yolov9-s.pt
gelan-s.pt

[jifeng632]

when i use https://huggingface.co/Xenova/gelan-c_all , i found

there's already nms in the exported model , but when i use export.py

here we need to write nms ,
how to export onnx model with nms and the output like [xxx, 6]