Way to detect instances of deleted components from external library

Hello! Here’s the situation: we created new component and deleted the older one from the library. But the older one is still used in our files, it’s not convenient to manually look for the old component and swap it to the newer one. Is there a way to do it quickly? Maybe some plugin could help. Thanks in advance

You can try selecting one instance from a page in the file and then go to edit > select all with > same instance OR variant depending on how granular you want to be. This selects all instances on the page, then you can just use instance swap in the right pane and voila.

There are also plugins you can use such as Instance Finder to help search for specific instances throughout your file, or just use the search feature.