In this we see how to use sosl in felxcard for getting account data.
Step :--1 We Create a FlexCard.
In DATA SOURCE > Data Source Type – Select SOSL
Click On Save & Fetch.
Step :– 2 On Build > Field > Drag in Canvas.
In Process …
Salesforce Guide – https://help.salesforce.com/s/articleView?id=sf.os_configure_a_sosl_search_data_source_on_a_flexcard_36600.htm&type=5