Good news! The last problem was from a ssd 2.5v cap that decided to die, it must have been ready to short from the first burnout.

I replaced it and everything got normal. I restored successfully and macos boots ok.
I also checked the hdd health and its 100% healthy.

It needed all chips to get programmed with jcid p13 as you said, even if some are alive.
Thank you all for your help!

Thank you for that! Indeed, it needed programming, I took the 5th chip U8600 out, programmed only that one with jcid p13 and now it passed the restore process and showed the lock sign.
But it looks like we have another problem, in that spot i believe the laptop should turn on at internet recovery mode but it does not....

When pressing power button nothing happens, fans do not spin, no chime, no image, nothing. Weird thing is i measured G3H and it fluctuates between 11.3v-12.65v.
On the usb meter i get 20v and fluctuating from 0.5a-1a approximately.
I also tried dfu...

Hello. If you could please help me understand what I am doing wrong...

This model, Macbook Pro 2019 16" A2141, 512GB, EMC 3347, with T2 Security Chip, had 4 NAND Chips shorted in 1 wing (U9100, U9200, U9300, U9400) and it has 1 more in the 2nd wing (U8600) BUT NOT shorted. All chips are TSB4227 TOSHIBA-KIOXIA SN4192TWNA12014 BGA110 128GB. I got 4 new nand chips for 1 wing and programmed them by specific position of course with JCID P13 programmer.

I also replaced the tps power ic for the ssd.
Now all rails come up, including the ssd rails 0.9v, 1.8v, 2.5v....