What assets are used

Is there any ways to see what of all asses are actually is used implemented somewhere inside an App? Otherwise it would be good to visualize that so you can easy delete them which is not used.
Imagine all assets used live in an APP has a highlighted BG in light green
All other with a white BG as now.
It would really be a small thing to then delete all other Assets. It would save space and and also redice app size for customers to Download.