You can easily search for specific dataset columns within your Data Lineage graph:
First, ensure you added all datasets of interest in your pipeline to your lineage graph.
Next, select all datasets of interest by using Drag select mode in the Tools toggle in the upper left hand corner of the app. You can also hold down Ctrl / Command to select multiple nodes at once, or use Ctrl / Command + A to select all nodes.
Then, select View histogram of selection properties from the Data Lineage sidebar.
Under the Frequent Columns section, you can see the most frequent columns by name in your selection.
Click one of the columns to highlight the datasets in your selection that contain this column.