I've watched Sean Carroll videos where he describes how to use Everett's many-worlds interpretation (MWI) for e.g. https://en.wikipedia.org/wiki/Schr%C3%B6dinger%27s_cat. Superposition of one particle's stats entangled with corresponding environment. No need to use probabilities for collapse, one function of the universe. Also I thought it supports Einstein's "God does not play dice with the universe".
Recently I recalled https://en.wikipedia.org/wiki/Particle_decay and got curious: does Everett still need to use probabilities for decay or it is explained in other way in his interpretation?
I could not find the answer via googling.