Help needed: Bricked A6 v1.3 board

[schma]

Hi everyone,
I'm seeking some technical advice on reviving an A6 v1.3 board (ESP32-based).
The situation: The board was running ESPHome perfectly. However, following a Wi-Fi AP migration and some "beginner mistakes" within Home Assistant, I’ve lost all connectivity to the device.
The problem:

• No OTA: Since the Wi-Fi credentials are now incorrect, I cannot access it over the air.
  
• Serial flashing fails: I am unable to upload new firmware via the onboard USB port.
  
• Hardware status: The onboard USB-to-Serial chip seems functional (it's recognized by the OS), but there is zero communication with the ESP32 SoC itself. It won't enter bootloader mode or accept any flash commands.
  

My questions:

1. Is there a way to "force" this specific board into flash mode if the auto-reset circuit is failing?
   
2. Can I bypass the onboard serial chip and flash the SoC directly using an external FTDI programmer? If so, does anyone have the pinout for the RX/TX/IO0/EN pads on this v1.3 board?
   
3. Are there any specific recovery tools or "low-level" utilities (besides esptool.py) that you would recommend to "wake up" a non-responsive ESP32?
   

I would appreciate any tips or schematics to help me save this board!
Thanks in advance!