After the one UI update the split screen is not working.
I saw many solution in which they say that after pressing the recents key press and hold the app badge and you will find the option in a drop down menu.
But when i tried doing it the drop down menu only contains two options from which one is lock this app and the second is app info.
I think there should be supposed to be more options like split screen and pop up window.
I tried it with several apps but the results are same.
Before the update split screen used to work just fine.
It would be great if someone could help me
Open recent, then tap the top Icon of the app you desire in split screen and you will see an option for split screen view.
Don't forget to click on "Accept as solution" to help other people with same problem