Price for RLX timing belt change?

Just bought a new 2020 Sport Hybrid last summer (yeah, I am thinking way ahead), and being the only car in my stable with a timing belt I am wondering when and how much others have paid to get the work done. The owner's manual doesn't give a specific mileage, so I guess the MID indicates the service schedule when to change the belt? And if so, is it around 90k like most seem to indicate?

Lastly, the only accurate pricing info I could get was KBB, which said the belt should be "around $500." Has anyone had the service done and can comment on what it cost them?