Where is the menu for creating headers and footers?

To make headers and footers in the Insert menu, in the Insert menu there are various sub-menu groups as follows

1. The Pages sub-menu group for creating cover pages, blank pages, and separate pages
2. The Tables sub-menu group to create a table
3. The Illustrations sub-menu group includes images, creating various shapes, icons, images, and 3-dimensional models.
4. Add-ins submenu group to enter add-ins or search content from Wikipedia
5. The Media sub-menu group to insert videos into MS Word 2021 documents
6. The Links sub-menu group is for inserting links into MS Word 2021 documents
7. The Comment sub menu group is for inserting comments into MS Word 2021 documents
8. The Text sub-menu group is for inserting text boxes and various types of word art into MS Word 2021 documents
9. The Symbols sub-menu group is for inserting mathematical symbols and various kinds of mathematical calculation models into MS Word 2021 documents