Raspberry Pi 4 Model B with External WiFi Antenna Connector (U.FL) | eBay
Raspberry Pi 4 HDMI Is Jamming Its Own WiFi | Hackaday
U.FL WiFi Raspberry Pi antenna - for Raspberry Pi Botland - Robotic Shop
Amazon.com: Antenna for Raspberry Pi Compute Module 4 CM4 Compatible Antenna Supports 2.4G/5G WiFi Frequency Band @XYGStudy (ORD-CM4-ANTENNA) : Electronics
Raspberry Pi 4 Bullseye WiFi – Country Code
Setup WiFi on a Pi Manually using wpa_supplicant.conf - Raspberry Pi Spy