Hi Costantin,
Thank you for contacting support. To achieve batch processing via Google Ads API, you can refer to MutateJobService which provides a way to perform batches of operations on multiple services without synchronously waiting for the operations to complete. Additionally refer to Batch Processing guide in Google Ads API for more information and supported operations. Please let us know if you need any additional information.
Regards,
Nikisha Patel, Google ads API Team