It all depends how long do you have your phone, it is normal the battery loosing capacity over the time.
My XZ Premium also lost around 200mAh (200 000uAh) over 1 year time.
But as the green text says it is still within parameters.
I bought the phone in May 2018 and only charged it with the stock battery charger and I have always kept it between 90 and 20/15% and never let it plugged into the wall for more than needed.
Every phone battery will behave in different ways depending on several factors, but you have nothing to worry about by now as the XZ1 Compact battery is of 2700mA and yours as said seems to be still within good value.
