QGIS 3.10 Recent Projects List missing
It seems the panel is hidden:
Can you try to drag and drop the border of dialog like in this GIF?
Answer from Nyall, https://github.com/qgis/QGIS/issues/33718#issuecomment-573907204
This is the solution, the pane is hidden. Seems like a bit of a UI failing on the designers of the welcome page...
https://github.com/qgis/QGIS/issues/33718#issuecomment-573907204