No luck getting the network bridge to work - the script referenced here seems to be focused on snaps but it might give some clues. The attached log says nat entries are missing. Maybe apparmor is relevant too but that may need a kernel update. I guess some more reading is required.
lxc-checkconfig.txt (Size: 1.62 KB / Downloads: 309)
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Edit: The likely solution is to build the latest version of anbox but arm64 support appears to be work-in-progress so I'll leave it for now.
Extra: The instructions listed here may work for someone. I can ping 8.8.8.8 from the container as root after setting the default gateway but last two steps produce a rtnetlink error.

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Edit: The likely solution is to build the latest version of anbox but arm64 support appears to be work-in-progress so I'll leave it for now.
Extra: The instructions listed here may work for someone. I can ping 8.8.8.8 from the container as root after setting the default gateway but last two steps produce a rtnetlink error.