There are lots and lots of Quantum Mechanics Interpretations. This tells about our sad state of affairs in understanding reality. We are only mathematically tracing the shapes that real phenomena cast on the walls of our cave.
It is true that Copenhagen and Many Worlds are the mainstream QM interpretations, but there are a bunch of other less known QM interpretations that fit in the space between Many Worlds Interpretation (all possibilities coexist) and Superdeterminism (Only one possibility exists, and it's already set).
I wanted to talk about the two QM interpretations that I find really insightful.
The first one is the Transactional Interpretation (TI):
The main idea is that spacetime is an emergent phenomena, created by all the energy transactions performed by quantum objects in the quantum realm. Change and momentum are more fundamental than space and time because, unlike the latter, the former always imply a relation between two entities, so there can be no energy exchanges without both emitter and absorber. What materializes in spacetime is not a unique event, but two events (emission and absorption), separated by the spacetime interval that express the exchange of energy that took place between emitter and absorber. Transactions always emerge as linked pairs of events at the ends of the interval that unfolded in spacetime. I recommend reading "Understanding Our Unseen Reality" (https://www.amazon.com/Understanding-Our-Unseen-Reality-Solving-ebook/dp/B00TZPIOM2) by Ruth E. Kastner. It can really change the way you think about reality.
The other interpretation is Relational Quantum Mechanics (RQM):
It basically states that no physical phenomena stands on its own. All properties for the entities we can observe in the universe are defined by the relations they have with all the other entities out there. The universe is not made up from objects, but relations. To exist is to interact, and every phenomena is defined by the exchanges it performs with everything else. You can see that it leads to the same conclusion than TI: there are no single events in the universe, as any relation always has two ends by definition. I recommend reading "Helgoland" (https://www.amazon.com/Helgoland-Making-Sense-Quantum-Revolution-ebook/dp/B08LR73RTL) by Carlo Rovelli. It was a riveting reading that left me speachless at times, like Kastner's book.
