From Canon U.S.A.:
In response to feedback from customers about the recently launched PowerShot G7 X Mark III, Canon U.S.A. plans to issue a firmware update that can help improve video autofocus speed, accuracy and subject detection performance.
This update will be free for all customers to download from the Canon U.S.A. website at the end of October 2019.
The Canon PowerShot G7 X Mark III is in stock at B&H.