I think the issue here is that you're mentally including basic moving-around, such as the school run, housework, and looking after a toddler, as "exercise." In doing so, you're kidding yourself that you're doing more exercise than you actually are, and feel hard done-by as you're not losing weight.
Whereas, in reality, if you didn't have the watch logging everything, then surely it wouldn't occur to you to even consider this basic daily activity as exercise. This is one of those scenarios where the fitness tracker may actually be doing you a disservice.
So in reality, today you've done 20 mins of exercise over and above the baseline daily activity you presumably would've been doing anyway. And 20 mins of HIIT is probably the equivalent of about one biscuit.
In comparison, the only calorie logging I do is my run training, and that's only because Strava automatically does it for me.
If I also started factoring in my 40-min bike commute, housework, "running around" after two kids, climbing/swimming/jogging with the kids etc into my "allowance" of calories, and eating more to compensate, I'd be bloody huge by now.
I think fitness trackers can encourage some people to develop a warped relationship with physical activity. Exercise isn't about earning calories to eat back, it's about being physically, and mentally, fitter and healthier. Which then, in turn, often leads to a better relationship with food and healthier eating; because if you're fit and active you quickly realise you can't fuel that activity on takeaways, booze and chocolate.