NTFS Drive for bootcamp partition no longer visible in Disk Utility. Cannot reinstall macOS through recovery because of TargetDisk not convertible to APFS Error

You must boot into Internet Recovery Mode using Command + Option + R to access the online macOS installer. Within Disk Utility you will need to click "View" and select "Show All Devices" so that the physical drive appears on the left pane of Disk Utility. Select the physical internal drive which should be identified its make & model. Erase the whole physical drive as GUID partition and APFS (top option). If for some reason you are booted to an older version of macOS like 10.12 or 10.13, then you may need to erase the physical drive as GUID partition and MacOS Extended (Journaled).

The critical part is making sure to erase the entire physical drive.

If you cannot boot into Internet Recovery Mode due to some sort of network issue, or there is some other issue reinstalling macOS, then you will need to access to another Mac running macOS 12.4+ in order to "Restore" the firmware which will reset the T2 security chip & firmware, properly prepare the internal SSD. It may also push a clean copy of macOS to the internal SSD, but there is a chance you will instead need to reinstall macOS from Internet Recovery Mode after "Restoring" the firmware. I'm not sure if macOS is pushed onto the internal SSD of the Intel Macs (I think it did for some, but not others....Apple's documentation implies no).

Revive or restore an Intel-based Mac using Apple Configurator - Apple Support

aPioquinto wrote:

I have a 2018 Macbook Pro that previously had bootcamp. When on windows, I vaguely remember trying to repartition it to have more space on the windows partition.

Yeah, that usually messes stuff up. The easiest way to fix this is is to back up your Mac with Time Machine (if you have data you want to save), then erase it completely (from macOS Recovery, which erases the entire disk) and restore from the backup.

1. Back up your Mac with Time Machine - Apple Support
2. Use Disk Utility to erase an Intel-based Mac - Apple Support
3. Restore your Mac from a backup - Apple Support