Hi, Natalie! I’m so sorry for the delay. Check out THIS POST here to understand why you should never focus on caloric expenditure – what you burn is too hard for the common person to track, and your wearable isn’t accurate.
If you’re executing an endurance program like you are, I’d focus on AT LEAST maintenance or even a slight surplus to fuel your runs and prioritize performance! If you’re in a deficit with that kind of training you’ll sacrifice performance. So it just depends on what you want to do.
The net-net is you shouldn’t worry about calories burned. There’s no way to truly know.