I have no idea if Corona 8 works with your setup and R23. That would be a question for the Chaos-Corona Support.
R23 has in the Preferences an option to list plugins. (Option 1)
If you are in the Preference, there is a button (Preference Folder) in the lower left corner. Press it, and it should lead you to the Folder that contains files for Cinema 4D. One Folder is called "plugins". You can place the Plugin into this. (Option 2)
Screen Shot 2023-08-28 at 8.27.46 AM.jpg
Again, I have no idea about Corona's system requirements for the Plugin you have.
My best wishes