Basically just a mod that adds custom traps. There are a few mods out there at add custom traps but the always come with other features and stuff. I do not think there are any mods that add only traps (unless if I'm missing a few). These traps should also appear on any moon, custom or not.
#Custom traps
uncut harness
That has the teleporter trap
That has the missile turret
That has the Tesla gate
That has the Lazer turret, Bug zapper, function microwave, bear traps, industrial fan, flash turret, and air control unit
That has the sea mines and big Bertha
You may be able to change the configs in these to only feature the traps
alpine grotto
There's also my TestAccountVariety mod 
It has the Propulsion Mine, a Gift Mimic and a Prison "Mine"
You could disable everything you don't want
uncut harness
A e welcome to Ooblterra
I don't think ooblterra traps can be moved to the normal interiors
static mist
I don't think ooblterra traps can be moved to the normal interiors
Yes i said It but in italian
Ahah sorry
I deleted the message
They work only on Oobl Lab
sleek tendon
Yes i said It but in italian
Yeah it’s an English only server but it doesn’t matter as you deleted the message
brisk mural
Thanks everyone
brisk mural
https://thunderstore.io/c/lethal-company/p/XuXiaolan/CodeRebirth/
Sadly can't do this one due to how it's implemented. It requires WeatherRegistry to function
And WeatherRegistry messes with my weather setting which desyncs my games between client and host