Native firmware, I think.

We dont change firmware.

Is it possible to do with native firmware? It's critical for my case?

That is our Antminer models:

Antminer E9       
Antminer K7       
Antminer KA3       
Antminer KS5       
Antminer KS5 Pro       
Antminer L7       
Antminer L9       
Antminer S19       
Antminer S19 Pro       
Antminer S19 XP       
Antminer S19j       
Antminer S19j Pro       
Antminer S19k Pro       
Antminer S21       
Antminer S21 Pro       
Antminer T19       
Antminer T21       
Antminer Z15 Pro

(list is'nt complete)