Transmitting HR data to Wahoo Systm

Does anyone know if / how you can pair your Fenix 6 with Wahoo Systm using Bluetooth to provide it with your HR data? They are adamant it can be done. Instructions say to use virtual run but it doesn't pair so HR data is transmitted but only for 30 mins then drops out. Often that data is wrong too ie showing 80bpm when I am gasping for breath but I'd live with that if it did it for the whole workout