You can get data into Einstein Discovery:

In Salesforce Tableau CRM (Einstein Discovery), one of the straightforward ways to get data into Einstein Discovery for analysis is by using an Einstein Analytics dataset. These datasets can be directly used to create stories in Einstein Discovery, allowing for deep analysis and predictive modeling based on thedata already collected and structured within the Salesforce environment. This method leverages the integrated nature of Salesforce products to provide a cohesive and efficient analyticsexperience. Reference: Salesforce Help - Data Preparation for Einstein Discovery

https://trailhead.salesforce.com/content/learn/modules/wave_exploration_smart_data_discovery_basics/wave_get_smart_data_discovery_and_data