Is it that easy now? I actually was in this situation about 3 years ago and found I could not simply mount the ZFS drive - and I cannot recall exactly why. I think it had something to do with the pool…configuration(?), and I went down a rabbit hole trying to sort it out. Fortunately in this case the tradeoff in time was more valuable than the data (it was a system drive on a small SSD) so I had the option to ditch my efforts with little to lose. But, I did spend a handful of hours on it with no traction.