Hello,
I am Nikisha from Google Ads API Team. Please allow me to support your concerns in the absence of my colleague Bharani.
We currently do not have any timeline to share on the sunset date for Adwords API v201809. As mentioned earlier, " Neither the deprecation nor the sunset date has been set yet for AdWords API. Once the Google Ads API exits “beta”, we will announce the deprecation date and the sunset date will be at least 1 year after Google Ads API reaches feature parity with AdWords API". Please keep an eye on our blog post for future updates and announcements.
Regards,
Nikisha Patel, Google Ads API Team