There is, it's just not the same as it was on the S7 have a little read on this site link here => https://recomhub.com/blog/how-to-use-private-mode-on-galaxy-s8-and-galaxy-s8-plus/
Hope that sorts you out
Hello that method not working from I can't see driver mode after swipe down by two fingers. Are you sign user? You can see that option ?
Scrub that page link just tried it and it did not work (my bad) The secure folder is the closest thing to it it means you have to set it up as you would like it to be like what was the guest mode, and select which app's can be seen and used
Yeah as far as I can see from searching my phone and online a Mod should be able to confirm at some point but will keep looking around for you.