Suggested hardware

I have a question about the hardware.
For sure the atmega16 8bit is not the best option for hardware capabilities nowadays. Nevertheless, simplefoc shield is based on Arduino Uno.

What is your suggestions for hardware?
Microcontroller + Shield + Encoder.

Premisses are: Simple and fast start-up and didaidactic purposes.

STM32 microcontroller, such as any nucleo board
Shield: if you are not looking for the direct nucleo hat you may try the PowerShield-D (the new discrete component shield).
Encoder: This is a rather complex topic. Generally SPI magnetic absolute encoder such as AS5047P would work, however this really depends on the motor and use case.

If you are looking for a fully integrated board then you need to be a lot more specific about you use cases. I’m not sure what

means, sorry.