Here is the link to purchase an Arduino Hardware: https://store-usa.arduino.cc/products/nano-matter
https://github.com/SiliconLabs/arduino
Submissions are limited to issues discovered on matter nano boards listed above.
Here is the link to purchase hardware for your testing.
https://www.silabs.com/wireless/wi-fi/siwx917y-wireless-modules
Alpha quality code and not part of the program