One idea I had was to 'route' the Orange Pi 4's antenna outside of the metal casing, which may act like an RF shield and weaken reception.
The hole in the housing with 5V DC Out written below it works well for that purpose. I use a rubber cable gland to reduce risk of chafing the cable on the edges. I might design a 3D printable adapter for it if I get bored.
Would this antenna work better in a horizontal or a vertical position, or does it not matter?