Has anyone achieved 400-500 Mbps Uplink speed so far?

Yeah, highly possible.

But I am wondering if any vendor support that in 5G NSA.

3Tx UE: 1T for 2.1Ghz + 2T for 3.5Ghz SU-MIMO, CA + MIMO together.

Public network focus more on DL.

But industry use cases are different.

UE may be high resolution CCTV on large enterprise area or visual sensors for large measurement data in factory setting.

There seems to be confusion of public vs. private use cases.