Eh, I could barely make to 5000 mark!
Actually, yesterday I had tweaked some settings and checked Fitbit instead of phone sensor. I thought it will automatically sync with my Fitbit app. But it didn't! Probably, it only works with some additional Fitbit band or similar accessory. So today I toggled it back to Phone Sensors. Seems it's working fine now.
Onwards... to more @stupid ities from your darling - @stupid 😜