These instructions are relevant for both the Lineage page as well as the Pull Requests page.
In the Lineage graph, click on the entity (table, column, dashboard, file, etc.) you want to view its downstream/upstream. The information panel should open in the right side
Click on the "Dependencies" tab
Click "Downstream" or "Upstream" to see just downstream or upstream dependencies. You can also click "All" to see both downstream and upstream
โYou can also search a specific entity in the list
This works for both tables and columns. For columns downstream/upstream - just click on a column.