Date & Time: April 26, 2022, 22:58 PT
Frequency: Once
World name: Midgardsormr
Character name: Deso Cietas
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/Level: Bard/90
Party or solo: Party
In-game time: approx. 1:45 a.m. Eorzea Time
Area and coordinates: Aglaia
Housing: N/A
Steps:
1. Enter Aglaia, partied with FC member who was running Aglaia for the first time
2. Did not see Wondrous Tails message at end of raid or notice of first-time completion bonus.
3. Party member/FC mate received the achievement "Divine Intervention."
4. Had 0 retry points before raid. Still had 0 after raid.

I don't recall if there was a message at the beginning about someone being new to the raid. I presume this bonus applies regardless of when the raid was released...?