Third-party system cleaners (like CCleaner) or Windows Disk Cleanup may have automatically deleted these temporary files. Sudden Power Loss:
For most Windows users, minidump files are stored in a dedicated system folder: C:\Windows\Minidump
Gathering a Minidump After BSOD - VALORANT Support - Riot Games
Ensure your pagefile is enabled on the boot drive (C:). Set it to "System managed size" to guarantee minidump creation.