Hi, thanks for choosing Dell. I think the answer is actually 100GbE, QSFP28 to QSFP28, Passive DAC (0.5M, 1M, 2M, 3M, 5M).

The problem is the lack of documentation regarding how to create stack in the new models 3200

Hi, you may have seen these before but I will still attach for future reference anyway.

https://dell.to/3G43Wby
This is the documentation for N32XX series

https://dell.to/3IaWpcQ
this is the N-Series manual which is applicable for all N-Series as well.

I read it. But there isnt a config example for the Qsfp28 stack. Only old version with SAS cables

I only found this article but is related to S4810 switch

https://dell.to/31mQZu4

Exactly, there isnt any information about the new models..