afaik consenting to seeing targetted ads does not affect data collection at all, only affects what you see. Trust me, Facebook is going to collect data on you regardless lol. I’d recommend just accepting to see ads so that you can go and delete your account.
But if you’re doing it so that Facebook will delete your account, then dont expect the data to actually be deleted. Facebook doesnt care about the law, and you have no way to verify that it’s deleted.
What goes onto the internet generally stays their for forever. Security through obscurity is your best option in that case.