There is a project called "OmniROM for Passport" that surfaced in 2018. A developer managed to boot Android 7.1 (Nougat) on the Snapdragon 801 processor inside the Passport. However, it suffered from fatal flaws:
While this isn't a "ROM," some enthusiasts have created patched versions of the OS (like ) that update the Android Runtime libraries slightly. This allows some older Android apps to run, but it is increasingly unreliable as apps require newer Google Play Services. blackberry passport rom
The home screen bloomed into life. It was Android, but not as the world knew it. It was optimized for the 1:1 aspect ratio. Icons were crisp, and the signal bar showed full LTE. There is a project called "OmniROM for Passport"