Google has released version 19.1 of the Google Ads API, adding new tools without breaking compatibility with v19.
Key updates include ad group-level channel controls and planning support for Demand Gen, new reach metrics, and audio ads support in video campaigns, advertisers can now override brand exclusions in Performance Max for Shopping ads and assign conversion customers during account creation.

Client libraries will be updated next week.
Read the official announcement here: Announcing v19.1 of the Google Ads API.