Just found out my friend is getting abused. What do I do?

All the information I heard ( im in 9th grade)
1) So apparently her dad cheated on her mom and he posted it on facebook hugging a different women she found out and asked him about it he got mad and beat her up bad

2) And her mom favorites her siblings like once she was helping her brother study and gave him candy her little sister cried to her mom when she didnt get candy and she got punished for a month

3) her parents went on vacation while they were young and because she is mixed her mom is a diff country while her dad is saudi her aunt (saudi) was like am not gonna cook for you guys because (racism) and she let them starve (because she was the oldest and still young didnt know how to cook)

4) her saudi aunts whenever she comes over they flex their dior bags on her (which isnt abuse really but still really mean)

Her parents were supposed to get divorced but stayed her mom married at 17 and her mom and grandpa) (her mom’s dad also have a history of abuse I think) I feel so bad when I found out this info I have no idea what to do am still in 9th grade

And she dosent even know I know this her friend told us (my gc) because when we called her mom asking when she will come to the b day she didnt even ask her mom and we were mad and her friend told us dont be too upset with her because she had a horrible relationship with her parents