this could be considered a spoiler but i think what im saying is important for anyone whos attempting the trials
the trials are split into three sections, beginners, middle, and final trial. once you finish one of the three, the next trial becomes available. you do not have to go through all three trials without dying since they are all split up. but there are no checkpoints inside the trial and if you die you have to do that trial all over again.
looking at twitter, i haven't seen anyone complete the trials on master mode aside from me. few people have definitely completed it on master mode but its extremely hard and getting down a strategy is very important. it was especially hard for me because i wanted to complete the trials before i even started any main quests. i only had about ten hearts and an almost full stamina wheel