Is it possible to bootstrap Balena OS onto a new ARM board? say the Rock64 4gb?
Have a look at the following pages, which have an overview of how to add support for a new board:
Also for reference, you can check the repos of other supported boards, like the Raspberry Pi:
If it is of interest and depending on the details, Balena may also be able to offer a custom hardware support package (a paid service). Check the sales contact details at the top of this page:
Let us know how you get on with it – we can help you further according to the direction you choose to go.
Did you ever get anywhere with the Rock64. I am beginning to explore using it for our project.