I don't use Mission Control for rides but I have seen a comment that for some models you need to connect the HR to MC. I was able to pair my HR to MC by connecting to my Creo, Ride, Smart Control, turn on Smart Control (normally off for me), Select HR for control. It then said no sensors connected tap screen and connected my Garmin HR. Once you have MC running you should be able to go to Tune and modify your display if it's available for your model.
The YouTube video at the top of the Turbo page is a quick review:
support.specialized.com
support.specialized.com
What heart rate devices are able to connect with Mission Control?
Mission Control has the functionality to connect with BLE heart rate monitor devices supporting the Bluetooth® “Heart Rate” GATT service specification. Specialized recommends using heart rate monitor straps and no other devices (wearables, headphones or similar).
I am experiencing heart rate connectivity issues. What should I do?
Please follow the following steps:
Ensure that you have the latest version of Mission Control installed on your device.
Remove previously connected bikes from both the Mission Control app and your phone Bluetooth devices.
Restart the pairing process. This may resolve the issues you are experiencing.
If the issue still persists, please complete our Specialized Connectivity questionnaire so we can help you solve these issues as soon as possible: