>>fnbr+(OP)
It's time to find a lawyer. I'm not one but there's an intersection with California SB 331, also known as “The Silenced No More Act”. while it is focused more on sexual harrasment, it's not limited to that, and these contracts may run afoul of that.
>>fragme+6C
This doesn’t seem to fall inside the scope of that act, according to the link you cited:
>” The Silenced No More Act bans confidentiality provisions in settlement agreements relating to the disclosure of underlying factual information relating to any type of harassment, discrimination or retaliation at work”