Android 11 handles external storage differently. You will need to put your ROM file in a folder like Downloads or RetroArch/ROMs and point the emulator to that specific folder using the system file picker.
Playing MVC2 on modern mobile hardware like Android 11 is a night-and-day difference compared to older ports. Because Android 11 provides robust support for high-performance emulators, users typically run the via Redream or the PS2 version via AetherSX2 . marvel vs capcom 2 apk android 11
First, a public service announcement:
: This version requires the naomi.zip BIOS file to be placed in your RetroArch "system" folder. ⚠️ A Note on "Standalone APKs" Android 11 handles external storage differently