[synchronizing]

Been using AppCleaner[0] with great success for years now.

[0] https://freemacsoft.net/appcleaner/

[jb1991]

There's also this, which lets you track down all files related to an app anywhere on the system and then manually trash them:

https://apps.tempel.org/FindAnyFile/

I used it recently get rid of a bunch of Wacom garbage that was littered throughout my system and causing the mac to crash.