You can still use your Lionheart band for tracking your home workouts.
It won’t link to the Lionheart hub and give you points etc, but you can link it locally to your phone to track your workout’s heart rate zones and overall calories.
Fitness Watches:
If you have a Garmin fitness watch you might be able to link your Lionheart to the Garmin as an external heart rate sensor, then just track your workouts on your Garmin watch.
I don’t think you can do this with Fitbit watches.
Apple Watch:
You can link your Lionheart to your Apple Watch as an external heart rate monitor - see this article on how to do that: Link Apple Watch to Lionheart
Wahoo:
If you don’t have anything else then the the best thing to use seems to be the Wahoo smartphone app.
Wear your Lionheart band, and then link it to the Wahoo app as a sensor
Create an F45 workout profile by going to
Settings -> Create Workout Profile
Scroll down to Gym
Choose Cardio Class and then name it F45
You can customise the workout pages displayed for the F45 profile - remove the map, disable GPS and add in the heart rate detail workout page
You can then choose the F45 workout profile from the home page and start it when your Zoom workout starts