The ROCK 3A is another single-board computer by Radxa, which has released the Zero, an upgraded Pi 4 Plus and the Pi X in the last year alone. The ROCK 3A features a Rockchip RK3568 SoC, up to 8 GB of RAM, and dual M.2 slots for adding an NVMe SSD and a Wi-Fi module. The Radxa ROCK 3A is relatively cheap, too.
https://www.notebookcheck.net/Radxa-ROCK-3A-New-Raspberry-Pi-sized-single-board-computer-arrives-with-two-M-2-slots-at-an-affordable-price.551857.0.html
Sorry but this will again be a unsupported SBC with bit things on paper, but little delivered through a half baked/compiled OS.
Raspberry pis might look weaker to some of these alternative boards in paper. But they are highly optimised with an overwhelming community behind them
I have one of these and can say that none of the Operating Systems Radxa claims the board will run completly properly or are developed fully. These companies put out boards faster than open source volunteer developers can keep up with. And they do not have the time to train the general public, in all the technologis associated with the hardware/software integration. Boards like thise are definately not a straight away replacement for a Raspberry Pi that has a full community backing.