This is from the owner's manual on battery care:

Capacity reduction of the traction battery
The capacity of the traction battery will decline gradually with normal use
over the life of the vehicle. The rate at which it declines is dependant on a
number of factors, including environmental conditions and the way the vehicle is used.
By observing the following precautions, battery capacity decline can be suppressed.
●
Avoid parking the vehicle for prolonged periods in areas with a high tem-
perature under direct sunlight when the traction battery is fully charged.
When storing the vehicle for prolonged periods, it is recommended to
park the vehicle in a shaded area or a cool garage. 
This helps minimize traction battery capacity decline.
●
When not driving long distances, it is recommended to charge using nor-
mal charge mode to help minimize traction battery capacity decline.

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P. 58, 72)
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Regular use of the scheduled charging function helps mitigate battery
capacity decline by avoiding storage at high SOC