Prescience isn't limited to seeing the future, but could also cover the idea that the person who saw it may have lived through it and is using the knowledge of said events to affect the present. Considering that Idriel's true self is trapped in Limbo (and possibly the Syndicate members as well) and based on the infodump about that place (being able to exist beyond normal time and space), it could well be that it's them who are stuck in some sort of loop and is therefore aware of things that may come to pass, not Orion.
I'd prefer this, but I can't shake that line from Idriel when Orion 'dies' and asks her for help, "There's no coin here, no reset". That's pretty straightforward, it indicates some sort of time related magic.
There's Orion's headaches when he sees a meaningful character like Calypso or the Founder, like his brain knows who they are but he can't access that information (or that's how i interpret it). Pretty unlikely he could've met Calypso as a kid in the present timeline, she seemed to be in the box for a long time.
The old man at VoTK knew he's blending in the crowd, despite Orion never been there before. I doubt he overheard any of their conversations prior, at least he's not shown in the background of any renders. Syndicate kid also knew where the gang was prior to robbing the bank, and their location was a secret.
Then we have those mysterious renders in early chapters showing Orion staring at a copy of himself and the morgue render.
Don't know what to make it of it all, but I'd be surprised if Orion and the current timeline was unique. My best guess is Idriel's glass shatter metaphor is linked to it. Even if there's some sort of reset, and the people are the same, if you shatter the glass it can have a different pattern.
The way Idriel appeared right before Thanatos attacked Orion even gave me a feeling like Thanatos might've killed him in that spot in the past, or at the very least, she knew he was coming. To me, she foreshadowed his appearance by saying something like "why is it that every time everything seems to fall into place, it all shatters in the blink of an eye?" - and bam there's Thanatos.
If Idriel can reset time by a simple coin toss, that's pretty OP, but perhaps this is the last time she's able to do it.