How do I connect my wifi range extender to my nowtv router? It doesn’t have a WPS button

What extender did you buy? 

There is a netgear installation assistant you can use instead of wps. 

here's the video of how to use:

https://www.youtube.com/watch?v=yJVklshxBMk

 

you can also go to netgear.com/support/ 

type in your model number and it'll take you to install guides, manuals, firmware, etc.