Hi Carlos,
Thanks for contacting Syncfusion support.
SfDataGrid is an virtualising control. We will create the row and column for visible viewport only. For, every scrolling we will re-use the exit row with in-coming row and it same for columns too.. We have exposed the `DataGridSource` wrapper class to get the info of rows from `rows` API read-only property and `buildRow` method.
Please refer the below UG link for your reference,
Please let us know if you require any further assistance.
Regards,
Renuga devi S