Underwater Submarine Sci-fi Vehicle 3D Models

So I am new to the unreal forums so please let me know if I am posting in the wrong place or if I should be doing things differently.
Anyways I made this Submarine using Blender 2.83 and Quixel Mixer. Right now it’s a UV-Mapped 3D-Model with 32 522 Polygons and with Materials.
However, I am going to create additions to this model like weapons, sensors, and arms to manipulate things in the environment and different LOD levels.
On top of that, I am planing a smaller version of this sub and a bigger one. Thinking along the lines of upgrades for the ship.
The end goal is to create a pack with all these models, animations, and also a modular environment with ice-caves or something like that. Please let me know what you think.
I created a little video to showcase what I have done so far.