Cheats code help

[Gold D Soul]

Hello ,

Being new on this forum, I apologize for any mistakes I might make.
My request is the following:
I have installed the ppsspp application ( Android) and I want to use the cheat codes (which can be obtained anywhere on the web) but as soon as I try to make them appear, nothing appears. I have used 2 methods:
* With the application: Quickedit
* by installing the cheat.db file

But without success
The only thing I have in the ppsspp settings is on the screenshot attached.

Could you explain me where I made a mistake and tell me the steps to follow to make the cheat codes appear.

Hoping for a quick answer
Good day to you