Different to other Sipeed MAIX dev. boards, Maixduino was designed in an Arduino Uno form factor, with ESP32 module on board together with MAIX AI module.

Maixduino is a RISC-V 64 development board for AI + IoT applications.

Seeed has a number of other Arduino shields: https://www.seeedstudio.com/category/Shields-c-15.html