Earlier quoted context omitted.
//Imagine, you're living outside of USA/UK/Europe. Are you saying that Facebook doesn’t enable full account delete outside of countries that require it by law?
There's no reason to believe it's a "full" account delete even in the countries covered by the GDPR considering they brazenly breach the GDPR with their "consent" flow.
Given FB's business model, and the fact that they create "shadow" profiles for folks who don't even have FB accounts, I have no doubt that while their UI might pretend that your account has been "deleted", all the data still exists for their use.
Which is why, when I left Facebook in 2014, rather than attempting to delete or disable the account, I posted a goodbye to those on FB that I cared about and explained exactly why I was leaving (their predatory and invasive business model).
I then logged out and haven't returned. I did this because I figured that any activity on their platform would be logged and stored with everything else they'd already collected.
And that was seven years ago. Given what we've seen from them since then, it's pretty clear that I was right.
Just go away and don't look back. Otherwise you'll just give them more data.