Go to File>Collect Files
Check “Generate Report Only”
Click “Save” and choose a location.
Open the text file.
Near the bottom, you should see some text that says:
“Layer: Text Layer
External dependencies: ”
Below it should list all fonts used in the project.
If there is an easier way, I don’t know it.
InDesign collects fonts whenever you package a project (similar to AE’s Collect Files), but I have not found a way to do the same in AE.
If someone knows how, share, please.