First where to put plug-ins. One location or the other (preferably not both although the User profile should supercede the root version)
If your computer has multiple user accounts and each uses Gimp then put the plug-in in the root plugins directory
Just for your use, then it goes in your Gimp user profile, ~/.config/GIMP/2.10/plug-ins/
(If a flatpak Gimp then there is a flatpack user profile, look in the Gimp menu Edit -> Preferences -> Folders and in plug-ins check the paths.)
Not a plugin I normally use, I think aimed at animation makers, however in use looks like this.
Which gives two objects each on its own layer.
edit: If you give details of your requirements, there are other plugins that have similar functions.
If your computer has multiple user accounts and each uses Gimp then put the plug-in in the root plugins directory
Just for your use, then it goes in your Gimp user profile, ~/.config/GIMP/2.10/plug-ins/
(If a flatpak Gimp then there is a flatpack user profile, look in the Gimp menu Edit -> Preferences -> Folders and in plug-ins check the paths.)
Not a plugin I normally use, I think aimed at animation makers, however in use looks like this.
Which gives two objects each on its own layer.
edit: If you give details of your requirements, there are other plugins that have similar functions.