Raspberry Pi Pico W - (Wireless) supports WiFi 802.11n 2.4GHz out of the box along with BLE in the future. Best of all this board is manufactured by Raspberry Pi, which means excellent resources and a very stable port of MicroPython.
The wireless antenna is onboard and similar to that used on the Raspberry Pi Zero boards. The pins are standard pitch, so it's easy to solder pins on and get going with solderless breadboards. For industrial users, the Pico W can be soldered in place using the castellated mounting holes