Change Minecraft savegame settings in the 1.14?

Gi
- in Worlds
2

I wanted to ask if you can change the difficulty of survival mode on a started world again. LG

Sh
Ab

For the difficulty easy / difficulty {number}

0,1,2,3 so peaceful, simple, normal, hard

If you can't cheat just open world in the LAN and then activate cheats in the menu (you just have to do every session you want to cheat)