I did not make this, I found this pull request that hasn't been merged yet, that changes the minimap aspect ratio to be 4x3 instead of 1x1 I just compiled it and uploaded it here to put in a modpack for ease of use. Credits to Tyzeron and jeriks31
Link to original mod page: https://thunderstore.io/c/lethal-company/p/Tyzeron/Minimap/
Introducing a Minimap mod for Lethal Company, a dynamic solution designed to enhance your gaming experience. This mod seamlessly integrates a persistent minimap on your screen, ensuring that you're never left in the dark, whether you're playing solo or in co-op mode.
For solo players, this mod emulates the real-time information flow that would typically be provided by a partner stationed at the ship's terminal.
In co-op mode, the Minimap mod ensures that everyone can join in the excitement of venturing into the building, eliminating the need for one player to stay back at the ship.
These are the default hotkeys:
F1 - open the Minimap Mod menuF2 - toggle the Minimap visibilityF3 - override the ship controlsF4 - switch the Minimap target (when ship controls are overridden)All hotkeys can be easily reconfigured via the Minimap mod menu.
The Minimap size, position, and the hotkeys, can be customized via the mod menu.
By default, the Minimap is synced with the ship's control panel. However, you can override the ship controls. This way, you can ensure that the Minimap focus doesn't change even if your teammate switches to a different player in the ship. It also allows you to switch the focused player on your Minimap without affecting the Minimap or ship map of other players.
This is a client-sided mod, meaning that other players don't need to have this mod installed.

Install BepInEx (see BepInEx Installation Guide)
Launch Lethal Company once with BepInEx installed to generate necessary mod folders and files
Navigate to your Lethal Comanpy game directory and go to ./BepInEx/plugins
BepInEx and plugins folder should have been generated in the previous stepC:\Program Files\Steam\steamapps\common\Lethal Company\BepInEx\pluginsDownload the Minimap mod, unzip it, and navigate to ./BepInEx/plugins
Copy the DLL file (ex. Minimap-v1.x.x.dll) to the plugins folder
Launch the Lethal Comanpy game and enjoy your new Minimap mod :)