MicroPython for Arduino

MicroPython for Arduino is unable to detect both the Arduino R3 and Arduino R4 Wifi.

The Arduino Nano ESP32 is detected however it failed upon pressing install.

I've tried double pressing the button on all three boards with no luck; I've also tried different usb cables.

Is MicroPython no longer supported?

Micropython was never supported by the AVR boardlike uno r3.
Ii suppose it could run on an uno r4 (ARM processor), but I don’t know whether it’s been implemented yet. (It’s not on the list of,supported boards.)

This thread might help you flash the Nano ESP32