Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Create your blank booklet, at least 4 pages. On the first page create a text box, go to Insert > text group and Insert File > browse to your Word file and insert. Publisher 2010 will automatically create new pages and text boxes flowing the text from one to the other. In my test the additional pages are added to the end of the publication so you may have to go back and delete the original blank pages.
Alternatively create your blank booklet, draw an empty text box on each page and add enough duplicate pages for the entire Word file in increments of 4 pages...you can add more later if necessary. Go to View and check Boundaries so you can see the empty text boxes. Open your Word file in Word, Edit > select all or Ctrl+A and copy. Go to the first page and first text box of your Publisher booklet and paste. Look for a three dot box on the lower right side of the text box and hover the mouse over it. It will say 'Text in overflow'. Click that box and a 'pitcher' icon will appear, go to the second page and second text box and 'pour' the overflow text into the next text box by clicking in that box. Click on the overflow text icon again and proceed to the next text box, etc until all the overflow text is visible. This method may take a while longer but gives you more control than the first as you can skip pages within the booklet.
DavidF