Does AWS Cognito support OAuth 2.0 Token Exchange grant type?

Based on the available information, there is no indication that AWS Cognito natively supports the OAuth 2.0 Token Exchange grant type. AWS Cognito supports several OAuth 2.0 grant types, including authorization code, implicit, and client credentials grants. However, the Token Exchange grant type is not mentioned among the supported grant types in the documentation provided.

It's important to note that while Cognito offers various OAuth 2.0 features and has recently expanded its capabilities in terms of token customization, the specific Token Exchange grant type is not listed as a supported feature. If this functionality is crucial for your application, you might need to explore alternative solutions or custom implementations using other AWS services in conjunction with Cognito.

As AWS continually updates its services, it's always a good idea to check the latest AWS Cognito documentation or contact AWS support for the most up-to-date information on supported grant types and features.
Sources
OAuth 2.0 grants - Amazon Cognito
How to use OAuth 2.0 in Amazon Cognito: Learn about the different OAuth 2.0 grants | AWS Security Blog
Amazon Cognito user pools now support the ability to customize access tokens - AWS
Amazon Cognito user pools now support the ability to customize access tokens