You can do a mail merge in Microsoft Word and Excel to create personalized documents for many recipients at once.

Alternatively, you could put the header row data in the document header. Thereby avoiding having to redo it every time. Merging into tables is a huge PITA, especially for a repeating report.

Navigate to the second document you wish to combine and click ‘Insert’. Repeat the process for any additional Word documents you want to merge.

Microsoft Word has a date field, but it's not easy to use in an expression. If you need to update dates in a document, use Excel to calculate the dates and then run a mail merge.

You can combine Word documents using a built-in tool to add as many documents as you like to a single file.

If your source data is in Excel and has duplicates, run Power Query to remove those duplicates before running a Word mail merge.