Most custom VMOS Android 9 ROMs come pre-built with a toggleable root switch. Go to the VM's built-in settings menu. Look for the option and switch it to "ON".
Enable "Game Mode" on your host phone if available. Inside VMOS, lower the resolution and turn off graphics-intensive options like anti-aliasing in your game's menu. Issue 3: Virtual machine randomly closes/crashes Vmos Rom Android 9 64 Bit