H1b in process, can i apply for H4 EAD extension?

My H1b was selected in visa lottery this year but the case has not been updated since then. It was filed with COS. Meanwhile, my spouse’s employer filed for the h4 extension in premium but did not file for H4 EAD extension. The current EAD expires in Jan 2019. Can I apply for H4 EAD extension while my H1b application is pending?