Is the battery worry-free protection for Highlander provided by the 4S store, GAC Toyota, or the battery manufacturer?

Do I have to go to the 4S store to replace the small battery in the car? Any advice from fellow car owners (EHS9)!

If I don't maintain my car at the 4S store after the four-year or 100,000-kilometer free maintenance period, will it affect the lifetime warranty?

How many free maintenance services does the manufacturer provide?

I went to the Toyota 4S store yesterday to check out this car. The exterior and interior are both acceptable. I'm just a bit concerned about one thing: the particulate filter is located in the middle section of the exhaust, which is a bit far from the engine. Theoretically, since it's a naturally aspirated hybrid engine, the operating temperature is lower and the filter is farther from the engine. Wouldn't the particulate filter be more prone to clogging? What do you experts think about this issue?