The main functionality that this release introduces is the new implementation of Aggregations in QueryExpressions. Before, aggregations were only supported in FetchXml queries, but later versions of the Microsoft CrmSdk also added support for aggregations in QueryExpressions.
Aggregation types include:
As well as special types of grouping columns for datetimes:
You can find more details about these new types of aggregations at https://learn.microsoft.com/en-us/power-apps/developer/data-platform/org-service/queryexpression/aggregate-data