It seems like Facebook won't delete your messages from the recipient's inbox when you delete your account. People send a lot of personal information in messages including their address, phone number, schools, work, etc.
Is this a violation of the CCPA (obviously if you live in California)? WhatsApp doesn't store messages on the server so obviously they can't delete messages from their server. And Instagram does delete your messages from both sides when you delete your account, which is what makes this choice even more odd, given that the Facebook product is in much hotter water regarding privacy.
I know this has been asked before in relation to GDPR, but I wonder if the same holds for CCPA. Here is the other question: Facebook vs GDPR - Private Messages I sent to others will never be deleted/erased from Facebook servers