Hi, Reivilo. A good news is Grove Shield for SeeeduinoXIAO with 25*58mm slim rectangular shape is about to enter mass production period, and hopefully you could see it on the Bazaar in June.
This version is main designed for wearable senario and with more on board functions.
May I know what factors prevent you from choosing a circular form board?
We will seriously consider to add a SWD connector, and just do not hesitate to let us know any of your thoughts on its design.
Thanks~