No, and it used to upset me, but I'm starting to think that 4K might be enough at 27", and possibly even at 32" for some people. I found this cool calculator that shows how close you need to be to distinguish individual pixels.
https://www.designcompaniesranked.com/resources/is-this-retina/
Here's what it says:
5K 27" - 16 inches
4K 27" - 21 inches
4K 32" - 25 inches
So what this is saying is that a 4K 27" monitor will look just as sharp as a 5K 27" monitor if your eyes are at least 21 inches away from the screen. You should measure how far your eyes normally are from your screen, and from that, you can determine whether you actually need a 5K monitor or not.
In my case, when I lean back in my chair, which I do most of the time, my eyes are 27 inches from the screen, so most of the time even a 4K 32" monitor would look just as sharp as my 5K iMac. However, I do occasionally sit up straight, and in that position my eyes are only 21 inches from my screen, so I would be able to notice that a 4K 32" monitor is less sharp in that position, but it seems like I could get away with a 4K 27" screen and never be able to tell the difference.