If you are interested in such topics, read

't Hooft, Gerard: The Cellular Automaton Interpretation of Quantum Mechanics

https://link.springer.com/book/10.1007%2F978-3-319-41285-6

Reference number 23.

Yes. Superdeterminism does away with the observer as a separate thing, so the question of free will doesn't even come up. Everything is just one evolving system.