It is not just you or your installation. They removed those commands from the context menu. Although it may surprise you, this is probably an improvement. Except for the most simple documents, you never want to use that kind of numbering or bullets.
How to create numbered headings or outline numbering in Ribbon Versions of Word by Shauna Kelly
How to control bullets in Ribbon Versions of Word by Shauna Kelly
Automatic numbering in Word has been problematic since Word 97, at least. There are a number of good ways to do it, but that numbering button is NOT one of them. Numbering in Microsoft Word


If you really want to, you can add it back to the text context menu. (Learning how to do it correctly through outline numbering attached to styles is easier, though.)
Customize Text Shortcut Menu