3D Printer MCU Firmware Transfer

My BIGTREETECH BTT Octopus Pro V1.0.1 (H723) controller lost its main STM32H723 IC to an electrical short. I will be ordering an identical replacement chip; what I need now is your expertise to move the original firmware from the burnt MCU to the new one so the board boots exactly as before.

What I know so far
• Goal: transfer the existing firmware, not develop a fresh build.
• Access uncertainty: the old IC powers up inconsistently, so I am unsure whether its flash is still readable.
• Tools on hand: a basic IC programmer that supports SWD/J-Link, hot-air rework, and standard soldering gear.

How you can help
1. Determine the safest way to probe the damaged MCU and, if possible, extract its full flash and option bytes.
2. Prepare and verify the binary for the new STM32H723 so it matches addresses, boot pins, and security bits.
3. Guide me—step by step—through flashing the replacement chip and testing the board, or offer the service if you prefer I ship the parts to you.

Acceptance criteria
• A verified flash image successfully written to the new MCU.
• Board powers, connects over USB/UART, and controls the printer exactly as before.
• A brief log or screen capture of the read-back/verify process for my records.

If the original firmware proves unreadable, please outline fallback options (e.g., locating the factory binary or rebuilding from source) so I can decide the next step. Feel free to ask for any board photos, chip markings, or programmer specs you need before we begin.