I only see the Push History for the last 30 days. Where did the rest go?
We keep such data for 1 month. You may find more specific information on this matter in the following article: How long does Pushwoosh store statistics?
This period may be extended. To make a request, please contact our Business Development team, your personal CSM or Support team to discuss the terms. Please note that you will not be able to obtain older data that was collected before the extension. It's not working retroactively.
Nevertheless, you can export such data on the monthly basis if you'd like to keep track of everything you've been sending.
Statistics API: https://docs.pushwoosh.com/platform-docs/api-reference/statistics-api/statistics-api-v2