Package flatpak for aarch64 as well?

[maxrdz]

Hello! I appreciate this project, it's nice having a nice and slim duolingo client.

I am interested in running this on my Linux phone, but I see that there is no flatpak for aarch64 systems.
Assuming this runs with JS, and the client is JS, I hope this is possible in the future to release for mobile devices.

Thank you again!