This might be a good place to mention the PlugInfo utility. It will run a blindingly fast scan of your plugins and report not only what is installed but which architecture.
It can be downloaded freely from
https://www.thinkersnacks.com/as-pluginfo.html
If you like it you can purchase it on the App Store for a very small fee. Not required but to support the developer. (I am not affiliated, simply a user)