Android x86 should run fine on any x86 system with virtualisation (not emulation). You can run it using qemu or VirtualBox on Windows or Linux. Emulation is too slow to be of any use.
All other options like running RPi image on nano using qemu wont work because the RPi hw is quite different (VideoCore GPU etc.) and qemu wont be able to virtualize it. At the most emulate it which will be pretty damn slow.
RPi has a large community and they why we see Android and Chromium OS ported to it. Jetson Nano itself will have less support from Nvidia in future
https://forums.developer.nvidia.com/t/jetson-software-roadmap-for-2h-2021-and-2022/177724