I want to know that after resetting iPhone can someone still get access to it?

I have a Xs Max Iphone and I'm going to sell it, I used it few years ago and I bought a new iPhone 14 so I want to know that I did everything that ur website says. I rest it and erased all the content and after doing that I got the intro that we can see when we bought a iPhone brand new showing u " HELLO " and the question is after I sell my phone can hackers or provisionals leaked my data! Can they hack or get data after I erased all the iPhone by some software or separating a chip from motherboard? Please I need an answer!!!