I had 3 of those 1 hour interviews for a position at Apple, with people watching every move and thinking of ways to break the solution. I don't think I could do it again, no matter what.

those exist. except I think the one I did was an hour(? it was ten years ago). I got the interview, but that didn't go well, so I went to work elsewhere.

they have part of the site that has lessons for developers:

https://app.codility.com/programmers/

I haven't used it for a long time, but they also have contests with some small prizes: https://app.codility.com/programmers/challenges/