Left out of the will. Estate likely tied up in Trust

Hello, my best friend's deadbeat dad died a few weeks ago. He has never really acknowledged her, never been a father. Never paid child support.

She's obviously left out of the will, and suspects it's mostly in a trust to cut her out.

Does she have any chance legally to fight this? The wife and family have more money that she does. Deep pockets usually win, so should she even bother?