The problem with side WordPress widgets is: a)-they appear on every page and b)-they are not specific to a particular page. The work-around is to allow PageBuilder blocks widgets to act as these side blocks. This means you can stage content or a PB button (widget) as a link to another page which is related to the content of that page.
This works great – however you would need to set columns so they would accommodate for the right side widgets. Theses side blocks area, are narrower than the page content. Here is what works for me: 4 col with 3 of the columns to be set at 28.4 with the side blocks or right column at 14.9.
A better solution would be to have these columns sizes to be saved for future use as a named template. As a workaround you could also create empty pages with these blocks. Is a more eloquent solution as a possible template found within the column creator which could be selected within the drop-down – “Columns with a Radio of”?