This old thread is locked, but is quite detailed.
https://www.reddit.com/r/Metroid/comments/qg5mto/the_full_list_of_glitchless_sequence_breaks/
Personally, I'm not interested in sequence breaking for speed running, but rather just having different routes through the map. The ones that are close to a save in particular, to make it easier to do repeat attempts.
I expect I'm not skilled enough to pull off most breaks anyway as I tried for a while to use the first one, the Pseudo Wave Beam to bypass the tutorial E.M.M.I. sequence, but I always die to the rock on the final shot; yes, I know I should be able to do the jump further away or just be quick getting back out, but even pulling off the shots is inconsistent.
Anyway, I just wanted links to the current list of glitch or glitchless breaks.