Is it also correct that even though I've passed, until I get my Licence back I can't take passengers with me?
Yes. But at least you've realised that you can fly solo (with an instructor sign-off as though you were still a student) - some people think they can't fly at all until they get the licence.
And of course if there's an instructor sitting in the RHS on a club fly-out with other people in the back you can do all the flying, you just can't actually log it as P1.