Where do I find the aws-cdk `module` notes?

In the v2.199.0 release notes, it says:

Please check the notes for each specific module for more information.

What does this refer to exactly?
What is a "module" in CDK V2 and where do I find the notes for them?

Are they referring the release notes themselves, with the implication that there should be a "module" based breakdown somewhere further down in the release notes (which there isn't, implying this is probably just a typo)?

Are they referring the release notes themselves, with the implication that there should be a "module" based breakdown somewhere further down in the release notes

Correct. This seems to be an issue with how the changelog is rendered. If you go to the PR that implemented the L1 changes (it's linked in the release notes), you can see that it does have the breakdown in its description:

BREAKING CHANGE: Some L1 resources experienced breaking changes due to updated CloudFormation resources. Please check the notes for each specific module for more information.

• aws-cdl-lib.vpc_lattice: the name and resourceConfigurationType property in CfnResourceConfigurationProps has changed from optional to required. Also, the name, subnetIds and vpcIdentifier properties in CfnResourceGatewayProps have changed form optional to mandatory.