Yes I can tell you what I did to make it work.
First download the .rpm file and move it into another folder for example wps-office-2019
.
With archive manager extract the content and there will be three folders: opt, usr and etc.
I usually mess up my system so I took the risk to do:
Right click to launch the terminal from the folder "wps-office-2019" and run:
sudo cp -r {opt,usr,etc} /
Thats all.
I recommend you to try it first in virtual box. Don't do experiments like me. :-p
You will see also an empty category "WPS Office" in the menu. It can be removed easily.
To remove all what you have done there are some more steps.