Hi @rmonterosapri , this is a known issue with the table view in Modern UI, and I believe the KNIME team are actively investigating options for the future.
Currently if you can’t see the columns in the view panel and also not in the pop-up view options from the node context menu, then I would suggest dropping an Interactive Table (legacy) node on the workflow and linking it to the node you wish to view.
That should give you the classic table view from which you will then be able to see the missing columns.
See also