I think so. It's been a while since ran it but iirc, it goes through a pretty thorough process of gathering & broadcasting.

In theory that should do it but I think it's overkill. With the outbox model, it's important that these events (both manual gallery events and kind 20/21) can be found on the outbox relays. Only. 👀

👀 I concur. I'm also thinking I've wrote to a lot of different, maybe forgotten, relays since Amethyst launched Galleries 😅 I'm not too concerned about my own images at the moment. They've been fleeting but sometimes present since I updated.