Hey PV,
there are two taxonomies that are named “tag” in Ikebana – one for the native WordPress blog posts (“Posts -> Tags”), and another for portfolio items (“Portfolio -> Tags”). The tag cloud widget should also have two “tags” options in its “taxonomy” drop-down; please try choosing the second one to display the portfolio tags in the widget. In case you see only one instance of “tags” in the widget, please let me know, I will investigate further.
Sincerely,
Andrii / Satori Studio