EventSub will report when an outbound raid has triggered
Only when the raid has triggered and if you are subscribed to the source channel on eventsub
Sounds like you need a uservoice, I remember filing one (or seeing one) about no “notification about a raid starting” when the raid API was introduced.
As to what the permissions on such a thing will be I don’t know.
https://twitch.uservoice.com/forums/310213-developers
As to if it’s a design choice or an oversight we’ll never know!