Careful with alarm fatigue. It’s unfortunately something your brain does without your permission. If you ever find setting lots of alarms stops being helpful, that is likely what happened. Basically, since you will end up brushing off a decent portion of those alarms as you are either still on task or don’t need to be on task yet “this time”, your brain will slowly think of those alarms as less important, no matter how important you want them to still be.

It can help to set as many different alarm sounds as possible. Sometimes, that can make it feel like each alarm is different, and they won’t all be lumped into the same category in your subconscious.