Yes, @ PJ_Glasso is correct…
@ cgwaltney it was the basic XIAO without the PCM chip. And the wire was added into the antenna “circuit” GND without removing the antenna chip itself and replacing it. On the basic XIAO the PCM footprint GND was the easiest/safest place to add the wire to affect the antenna circuit. But not a substitute for replacing the original antenna and the need to re-tune the antenna circuit via the FEED.