Yes apple is following the fold. I think it's going to be more like the flip personally. Like others have said, the fold phone will get more popular when apple comes out with one. Samsung had smart watches first also and people were slow at getting them, then almighty apple released theirs and all of a sudden everyone was getting them, it was like there was never such a thing until then.
I'll give Samsung one thing, at least they innovate, something apple hasn't done for a long time. It used to be the other way around.
By the way, welcome to the fold 4 club. I'll be curious to see how you like it. I think the small improvements are great in real usage, small on paper.