Christine_ASUSIt does show data usage but is very inconsistent. And it resolves when i toggle on/off mobile data.
I just tested my devices, please check "Hotspot & tethering" <--> "Google Play Store"+"Youtube"
*Left: ZB602KL V432, factory reset>device setting with the Wi-Fi>opened mobile data and hotspot
*Right: ZB602KL V087, factory reset>device setting with the Wi-Fi>linked to the hotspot of V432 device and downloaded PUBG and watched YouTube video
Christine_ASUSIt's okay. I understood the screenshots and i believed it because i too have the same results, just not always.
My testing result is consistent to me due to my device on right, ZB602KL V087, had download some system app from the work place router first so the device on right had slightly more gigabyte usage than the one on left, which is ok for me. Sorry that I didn't clarify it first. BTW, have you unlocked/rooted the device before?
Anyway, thank you for letting me know. I am always glad to discuss some situation with you 🙂