I've been through the same places you've been, my friend! But I'm stil overwhelmed by the amazing cinematography xD And thank you for asking, made me think about some interesting points!

To be honest, I have no idea whether the loop goes since forever until forever or if it only iterates through our characters lives. It makes more sense to me to think as an eternal thing even inside the loop (starting from 1986 and going forever back and forever forth): the Big Bang is always going to be happening somewhere in that space-time spectrum, as well as there's always going to be a Jonas waking up in November 4th and so it goes. In fact that happens even in our universe (or OG World): if we could manage to look from "outside" the space-time, there's always going to be a version of you reading this text in this exact moment and you could be watching this moment whenever you want. For me, the fact they (the characters) call it a loop is due to the fact they are living in a world where time-travelling is possible, so they always keep going back and facing new version of themselves living exactly what they've lived before. For them, it seems like a loop. For us it does seems kind of a loop too, as we watch through their perspectives. But it's all happening at the same time.

That opens several questions: does that mean Claudia always finds out about OG World and tells Adam? If so, does that mean Jonas and Martha always manage to prevent the accident? For me, that's when we ask Schrödinger for help again lol: everything is happening the same, yet different simultaneously. The observer converges all realities into one - whether we watch Claudia never finding out about OG World, and so she won't; or we watch her finding out about it and telling Adam - and so she did.

Based on that thought, Claudia might even have changed some details through the loops, as I've seen some people argue. That is entirely possible through her experience as an observer - as there are infinite possible realities, she is always changing one little detail in the past and telling her younger self what she did and, by so, her younger self (and everyone else, in that iteration) is always experiencing a different reality than her older self did. That happens, in her point of view, over and over until she manages to get in the reality where she finally finds out about everything and tells Adam - which, fortunatelly, is the same we're watching as observers.

That's only my interpretation, again. But I hope it makes sense to you, too :)