as in https://forums.scribus.net/index.php/topic,5785.0.html
# In a multi-page Scribus document:
# 1 Select the textbox containing one or more columns.
# 2 Enter the number of the last page where you want to sequentially copy this textbox.
# 3 Choose "Yes" if you want the text to flow continuously from the first textbox to the last.
# 4 Choose "Yes" if you want to maintain the textbox positions as they would be in a facing-page document.
#
# original script from https://scribus-user.de/forum/viewtopic.php?f=13&t=655
the multiple duplicate feature is not that bad either...
https://forums.scribus.net/index.php/topic,5682.msg25003.html#msg25003
even better