I also use a Fairphone and haven't encountered issues with gestures while using a third party launcher (previously Niagara, now Kvaesitso)
Admittedly I switched the gestures back off anyway because I'm just used to using the on screen buttons for the moment
I saw this on someone's phone and was wondering what it was, seems neat tbh but I already own a ship ๐ดโโ ๏ธ