H4EAD Auto extension after i94 validaty date

Hi,
I filed H1 and H4 in regular process as my employer don’t support for H4 EAD, I need to file H4 EAD when I get the receipt numbers in a few days. H1, H4 and H4EAD are getting expired in next 3 months. Consider H1 and H4 will not be approved before H4EAD expires and my spouse will stop working. Can she get the auto extension of EAD from the day of H4 approval after H4EAD expires?

Normally, it is allowed to work if the H4 i94 is valid and EAD was filed timely and stays pending.

Thanks for your reply, I understand your answer but in this scenario I will get valid i94 after EAD expires but EAD extension will be filed before current i94/EAD expires, do we need to wait till EAD gets approved to resume the work?