@dubecates, according to the discussion here, I've seen most people reporting an increase in their heart rate. See this discussion:
- Post-Covid Racing Heartbeat? https://connect.mayoclinic.org/discussion/covid-1/

I can understand your concern. Bradycardia, or a low heart rate, is more likely as you age and could be a sign of health issues, but not necessarily. According to this article
- Is a Slow Heart Rate Good or Bad for You? https://health.clevelandclinic.org/is-a-slow-heart-rate-good-or-bad-for-you/

"If your heart rate is slow, but you don’t have symptoms, there’s no reason to worry. However, it’s a good idea to know the signs of trouble because bradycardia in some cases does require treatment."

@dubecates, what made you aware of the low heart rate at night? Do you have symptoms or did you notice it through an app or monitor?