This. If there's actually a toilet, then how does it work? I imagine the toilet probably works like the replicators do. You notice how when anyone on board the Enterprise eats, there's dishes, but no sinks/dishwashers? When they're finished eating, they literally set the dirty dishes down in the replicator and they're instantly returned back to energy. I imagine the toilets work under the same principle.

He should have a little door that slides open and lets him see the fishes when he's pooping, and then closed again to hide the head when he's not using it.

What are the two spare turbolifts for?

The transported feces is replaced with whatever the crewmember desires. In Picard's case, Tea Earl Grey Hot! Riker gets a vibrator. Troi, a particular mix of heroin and qualuudes.

maybe instead of teleporting out the entire contents of a full rectum, you teleport a ml at a time, or basically teleport every tiny bit as it enters the rectum, same with the bladder.

Honestly, teleporter tech is criminally underused in that universe.

can you teleport out co2 from the alveoli and replace with oxygen instead of needing a respirator? imagine 99% of surgeries could be done with teleport tech instead of needing to cut anything.

fuck, maybe that is how Hypospray works, and how it can inject drugs into the bloodstream without hurting the skin or the clothes they are wearing.

There is also the transporter buffer, they can put a lot of stuff in the buffer, why not use it for storage? Or maybe a brig?

One of the Abrahams movie casually made spaceships obsolete by having teleporters that can reach across the galaxy.

And those are ideas that I came up in a couple minutes of thinking.