The original dungeon(teleporter one) looks a little boring. The simple boss fight, lasers, small parkour

I think the dungeon needs a new Redstone, eg: levers should be opening the door in the correct position like 100110 in which '1' is switched on and '0' off if I did this arrangement then the door opens. there should be 6 levers, in which 64 different outcomes are there but only 1 opens, another trick is a room of 3 mystery paintings with only 1 painting going in the right direction the other 2 go to nothing room, if there is more 'Redstone' idea you have you can implement it

The new loots must be like cores, rams, wakrium ingots,quantium ingots(after floor 1) and Entronium ram, core

There should be machines like centrifuges, optibench, etc

The last thing, the tech villager will give you a dungeon tracker

The Dungeon Tracker tablet will help to find the nearest dungeon. If the player successfully teleports to the dungeon then the tablet stops working.

but if the player fails to teleport to the dungeon and the dungeon teleporter turns to a metal block or the old teleporter is destroyed, then the tablet tries to find another dungeon, it says the co-ordinate of the dungeon teleport block.

The tablet must be expensive like 20 emerald

feel free the build dungeon modules like these and add them to the gitlab project.