Another option would to be to hang it on the wall near the head of the bed but not directly above the bed. To the left or right, in other words.

A Google search brings up lots of options. And you can buy lights that clip on the bed rail.

Bunk bed shelf

You could do something like this.

FYI no night light it interferes with sleep as for the rest there are lots of clip on options for a fan and alarms come in all sorts of sizes too.

You might want to look into something like a bunk bed caddy. My kids had these years ago, and they could stash lots of personal items in them - book for reading, water bottle, etc.

Check out the offerings for college dorms. There are several little shelves that attach right under the mattress.