Heads: externally Flash NS50 (WSON Chip)

Hi!

Does anyone has tips/tuto on externally flashing the NS50 (WSON chip) using an external programmer?

There are a lots of them for flashing SOIC chips, but seems more complicated for WSON chips like used in the NS50 model.

I’m trying to flash the nitrokey’s heads build for NS50 on a NS50PU clevo model. Should work, but if anyone has tried, help is welcome;-)
Thanks!