An at least twice - if not thrice - asked and responded to question.

Sponsorship

Confer with an immigration lawyer in private about your parents' situation. Do not delay: parent sponsorship will be much harder, if not nearly...

Maternity Benefits from State

FMLA is your right while on H-1B. No effect on GC application.

How my divorced wife can apply for asylum when I was the main applicant before divorce?

Yes, wife can also file for her own asylum if she so qualifies,

Yes, that does count as 365 day sentence for Immigration law.

While an upgrade to PPS is possible, that normally is not a smart move - talk to your employer's attorney.

No impact whatsoever as long as explanation can be provided should the issue ever arise.

I am a Green Card holder for over 4 years. I have been recently laid-off. Do I have need to inform any government agency?

No such requirement to inform any government agency.

I submitted an i-765 application back in October 2019 and still i haven't got the decision?

You need to remain patient and keep on inquiring.

Can I work while waiting for spousal green card? Spouse is American citizen.

You can go ahead and continue working if you wish - will be forgiven as an IR.