However, can I reference a property of a linked object ?
For example, if I have a Table of Object As, can I display a column with a button that opens a URL that is stored in Object B’s property “URL” that is linked 1-1 to object A ?
Until a first-class solution exists, you can configure a right-click action on the table row (in the Object Table widget), and generate the link in a variable from the right-click object. So you wouldn’t have the link in the table as a column, but users would have to right-click on the row, and select the option to open the link.