Arduino has shrunk the UNO R4 with the Arduino Nano R4 board equipped with the same 48 MHz Renesas RA4M1 32-bit Arm ...

The board is built around an ATtiny3217 and has almost all of the Nano’s features, like a USB port, reset button, built-in LEDs, 5 V regulator, and preloaded bootloader.

The Arduino Nano 33 IOT has an ESP32 onboard (WiFi + Bluetooth) and crypto onboard with the uBlox NINA-W10. I guess the BLE versions dissipate less power than the ESP32/uBlox NINA-W10 version ...

Arduino has launched the Nano ESP32 development board powered by Espressif’s ESP32-S3 Wi-Fi and Bluetooth capable 32-bit microcontroller. ... ESP32-S3 MCU, as well as an antenna. Operating at 2.4-GHz, ...

Other features of the Maker Nano RP2040 small board which measures just 49.53mm x 21.08mm in size include support for the Arduino IDE, CircuitPython and MicroPython.