Every 5k miles, you’re intended to take it to the dealer to make sure the coolant is topped off, the wheel nuts are on tight
I have 2 EVs (A Hyundai Kona and a BYD Seal), both don’t check the battery coolant until 60,000 kilometers - either toyota doesn’t trust their battery system or your dealer is taking you for a ride
I have a $120AUD service every 15,000km and a battery coolant system refil at 60,000km that costs $600AUD
repeat every 60,000km cycle