My experience with Japanese cars is that the low-stressed low-tech engines tend to be quite reliable, but Toyota certainly has seen a lot more basic engine problems, outside of the problematic 3.0 V6s and general sludge problems in the past such as:
https://abcnews.go.com/US/wireStory/...lling-73881740
https://www.consumerreports.org/car-...camry-rav4-es/
https://www.industryweek.com/the-eco...er-engine-flaw
https://www.auto123.com/en/news/2018...pistons/64522/