Child born in the UK

Hi,

I am in the process of applying for my newborns PBS dependant visa. My question was regarding finances.

If on my CoS it states that my employer has ticked to certify maintenance for myself and my dependants as applicable, will this suffice as financial support for my baby’s PBS dependant visa application?
Or will I still have to show my bank statements as my baby was born after the issuance of my CoS?

My CoS was assigned last year and the ‘expiry date(use by)’ is November 2021.

Thanks in advance