[Extract every pages in a word document to new documents]

As have metioned above,  you can use VBA to do that, And I just find a macro may help.

Sub SaveEachPageAsADoc()
  Dim objNewDoc As Document
  Dim objDoc As Document
  Dim nPageNumber As Integer
  Dim strFolder As String
  Dim objFileName As Range
 
  '  Initialization
  Set objDoc = ActiveDocument
 
  strFolder = InputBox("Enter folder path here: ")
 
  '  Copy each page in the document to paste it into a new one.
  For nPageNumber = 1 To ActiveDocument.ComputeStatistics(wdStatisticPages)
    Application.Browser.Target = wdBrowsePage
    ActiveDocument.Bookmarks("\page").Range.Select
    Selection.Copy
 
    Set objNewDoc = Documents.Add
    Selection.Paste
 
    '  Save new doc with the name of "Page" & nPageNumber and get the first 20 characters of the new doc as part of the file name.
    Set objFileName = objNewDoc.Range(Start:=0, End:=20)
    objNewDoc.SaveAs FileName:=strFolder & "\" & "Page " & nPageNumber & " " & objFileName & ".docx"
    objNewDoc.Close
    Application.Browser.Next
  Next nPageNumber
End Sub

And I also attach the link in case you need more details.

 

https://www.datanumen.com/blogs/2-quick-ways-extract-individual-pages-word-document/

 

Good luck.