gissynicaragua

This is correct.  Once you have your green card you do not have to tell them if you get a divorce. Once you apply for your citizenship (you have to wait 5 years from original GC instead of 3) you will most likely have to inform them you are now divorced but it doesn’t change anything. 
I revived my brand new green card in the mail 12/19. It’s beautiful but it doesn’t have all the tiny presidents on the back. I am slightly disappointed about that! 

I don't think you need to do anything ... move on with your life as a GC holder ... the only difference is that you cannot file N400 based on 3 years rule but have to wait until 5 years ... Congrats on your approval and good luck with your next level

you do not need to do anything now. You are a green card holder. congrats! I hope you find a better life partner.