There are so many good ones:

https://youtu.be/4tzoIYyAhFY?si=VYlorRNmzOkUOaQ_

I’m fond of the The Borg Hive (ASMR loop)

I’m also playing this over the ambient sound and it just sounds like everyone’s ignoring their responsibilities

Red Alert

I prefer this:

https://www.youtube.com/watch?v=aRk-DQUUlz8

I prefer sleeping quarters ambiance on revanced.

https://youtu.be/ZfxKJIRYLzc?si=h_M6ztyw0v3cqevn

There’s also night shift: https://youtu.be/XajaCX88NnU?si=0QgLAQERw5O6OoeU

But the beeping can keep me awake sometimes. It’s rhythmic, but still extra noise.