Is the Aros research operating system compatible with AmigaOS?
I also add that the Amiga OS 3.1 softwares are theoretically compatible with AROS 68k, but many of them don't work or work badly because either the native AROS 68k libraries requests, are missing or the OS 3.1 software doesn't support the AROS 68k libraries.
Using or replacing the AROS 68k libraries with OS3.1 libraries or system files can increase compatibility, but then it is no longer an AROS 68k

The AROS 68k executables are in "ELF" format, so they cannot be used on Amiga OS3.