Calorie burn estimation doesn’t work. It just doesn’t. Most systems and devices are very, very significantly off.
You’re better off simply estimating your required calorific intake in a day and then counting your consumption. You just can’t use a device to tell you what you’ve burned and expect it to be in any way accurate. It’s one of those numbers manufacturers include because people expect it, but they really shouldn’t.
In testing, trackers are typically off (and usually over-estimate, which is the worse direction) between 27-95%!!!
There is another thread in this forum, which I’ll edit the link in here when I find it, that should help you estimate your required intake daily. Work based off that and your intake instead, forget about calculating burn. Link: Estimate your minimum daily calorie intake - #14 by coach.jinger.g