Hi, there is a set of tools named Good Lock by which you can customize your phone. One one the possibilities is change clock position. It worked only in Oreo but yesterday has released a new version for Pie!
Then install both. If you are in supported country you should be able to run GoodLock and QuickStar module directly.
If not you have to launch the activity. If you use launcher like Nova Launcher it supports this itself, or you can install Activity Launcher
Follow the instructions below:
I believe it can help. The article is about older version but it could be still helpfull.