They couldn't even be bothered to change a few lines of code to have a dark mode on the Fitbit app - something that's been highly requested since 2017. https://community.fitbit.com/t5/Feature-Suggestions/Dark-Theme-in-Fitbit-App-Android-Win10-and-iOS/i...
So I doubt they'd care about this as well.
Edit: oh, what you describe has actually been requested, more than once, since 2018. And what do you know? They don't care. Lol.
I've voted anyway. But I'm willing to bet nothing is gonna happen.
The writing is on the wall for Fitbit sadly.