I don’t think there is a way to do this without a full reformat and reinstallation. I would be looking for key recovery methods.
I think the main problem is the way data is rotated and managed in any flash device (SSD/NVME), but I’m also writing this to check back and see what others might say.
I think with flash memory management’s paging structures, if you want to know that no data is recoverable, the entire drive must have ever available page set to 0xFF. In any other operation, it probably just deletes the index header but not the physical data. Any hex dump of the actual flash memory can be recovered if it is not encrypted. If the entire drive is encrypted, simply deleting the index headers should, in theory, make it nearly impossible to find file entry points even if the person is quite advanced at cracking. At least, I’ve never seen someone demonstrate this kind of data recovery or vulnerability using tools like Ada or Ghidra. Most of the cracking that I’ve seen requires some kind of existing structure like unencrypted text strings to find an entry point.
W10 is dead at the end of this year. Just toss Linux on it for more value IMO. Fedora is quite straight forward to install. It just requires a USB with the .iso file. Use balena etcher to write the iso file to a USB flash drive from within Windows. Boot the device into the bootloader menu, either by looking up the key to trigger. It is often either F9 or F12. Then under boot options, be sure USB is active and ahead in the bootable order of devices. Finally reboot with the USB plugged in. It will boot into a live version of Fedora that uses the USB to load into RAM only. It won’t install or anything at this stage. You can then check that everything works in the full OS before attempting an install. During the install you can select the advanced options for drive management and fully overwrite the drive. This should take a VERY long time.