H1 to H4, H4-EAD with H1 Extension Pending

Hi Anil,

I am currently on H1B which is expiring in Nov. My extension has been filed and yet to receive any response on it.
I am planning to file COS to H4 and H4 EAD now.
Can I initiate an application for the same considering my extension is still pending for USCIS adjudication?
Also, can it impact my extension result in negative way?

There is no negative impact that i see. You can file it.