How to interpret the execute-api service APIs in the "APIs without an IAM action" section?

[cbruno10]

In https://github.com/glassechidna/trackiam/blob/master/services/execute-api.yml, under the "# APIs without an IAM action section, I can see there are some APIs that look like IoT APIs, but I'm not sure how they're related to the execute-api service (which I usually associate with API Gateway).

There's also the execute-api:UpdateTopicRuleDestination API, which I don't find an equivalent for in the IoT service yml, but I do see listed in the AWS API docs - UpdateTopicRuleDestination.

So I guess my question is how do these execute-api APIs relate to IoT, and should I use one over the other when looking for a definitive list of IoT APIs? Thanks!