
Just a reminder that whatever you chose during 3.8, This happened anyway (Lore implication)
For context, 3.8 is a retelling of what happened during Penacony. And it ends with TB, worried about Firefly's whereabouts after the big fight, and finally finding her. And this quest, unlike other quests in the game, has an actual different ending:
Either you decide to leave Firefly be, and The things about Finality, and the quote about the universe waiting for the Trailblazer to save it are said by Constance
Or you decide to keep the promise made with Firefly and stay with her, and the Trailblazer sees Firefly's third death, she makes the speech about finality and all that. After that, the Trailblazer uses the power of finality to make 2.3 canon and bring Firefly to see her fireworks.
While there's a choice, I don't think it changes retroactively what happened
You do not change the fact that whether or not the TrailBlazer went to see Firefly. You changed the fact that whether or not they decided to recover this memory and change the past to let her see the fireworks.
And upon recovering these memories, since they were done while a finality strand was around, the Trailblazer changed the past.
The TrailBlazer, in the original past, still went to look for Firefly and witnessed her death. At least that's how I view it.
We could argue that one end is thematically way better than the other and it's a flaw the writers kept, but still, this is that.
I can't exactly explain how some 2.3 events seem to be present post 2.3 If you didn't choose to stay, but it seems that, at least, the moment that happened in 3.8 where you find a picture surely happened retroactively.
And it seems the message from Silverwolf happened after Amphoreus obviously.
If you didn't watch the alternative ending of 3.8 where TB stayed with Firefly, I recommend watching it.