How do I restore a dead MacBook Pro with no operating system?

If the M4 Pro MacBook Pro is genuinely showing no bootable macOS, that doesn’t necessarily mean the machine is “dead” or that the OS is unrecoverable. On Apple silicon, the boot chain is handled by the Boot ROM/Low-Level Bootloader and APFS Preboot environment rather than the old Intel-style Recovery partition model, so the first thing I’d establish is whether the internal SSD is still being detected by Recovery/Disk Utility. If Recovery loads normally and the internal physical disk appears there, erase the existing APFS container (assuming there’s nothing to preserve) and reinstall macOS from Recovery... the installer will recreate the required APFS volumes, Preboot data and boot configuration automatically. If the internal storage does not appear at all, or Recovery itself cannot be reached reliably, that points to a different class of problem such as firmware/boot-environment corruption or a hardware/storage issue, and repeatedly attempting macOS reinstalls won’t address it.

For an M4, I’d also use another Mac with Apple Configurator/Finder to perform a DFU revive before considering a full restore, because a Revive can repair the firmware/recovery environment without unnecessarily wiping the machine.

Can you do this: How to start up from macOS Recovery - Apple Support and potentially from the Recovery menu, reinstall the last macOS previously installed?