H1b - L2 COS approved./ how long can I continue working for H1b

My H1b - l2 COS got approved within a month. Normal processing time is 2.5 months so it caught me by surprise. Can I still continue working for my H1b employer for some more days and complete my transition?

even i am looking for this answer… Is there a way i can contact you to share some information

You will be considered on L-2 from COS effective date and need to stop working on H-1. You can apply for EAD and can commence working on L-2 EAD once that gets approved.