>>2926330
Aha:
https://www.aliexpress.com/item/1005006987272421.html
Though it seems to have both the onboard SMD antenna and the U.Fl connector. According to this document:
https://wiki.seeedstudio.com/xiao_esp32c6_getting_started/
>The RF Switch feature allows you to toggle between the built-in ceramic antenna and an external antenna by configuring GPIO14.
>To enable this function, you must first set GPIO3 to a low level, as this activates the RF switch control.

Also the ESP32-H2 apparently does Zigbee (and Thread, but not WiFi?).