This repository [radxa/mraa] (https://github.com/radxa/mraa) is no longer maintained.
Repository radxa-pkg/mraa is used for building on-line mraa-package, it means that we can get libmraa by apt, and it update according to eclipse/mraa
We will support mraa for ROCK 3A this week.
PR for Radxa ROCK 3A is still waiting for the upstream merger. We’ll release immediately after the upstream merger.