With this mod, if you hold down a hotkey (default Left Shift) when interacting with a bed, it will bring up a list of other bed locaitons you can teleport to.
Clicking on a bed in the list will transport the player to the destination bed.
By default you will actually see the player move at rapid speed between locations; you can set it to teleport instantly in the config.
You can now set custom labels for beds by clicking on the space above the bed (you should see a prompt if you aim about 1m above the bed). Labels are stored in BepInEx\plugins\BedTeleport\labels.json.
Config
A config file for this mod is created in the folder BepInEx\config after running the game once with the mod installed.
You can adjust the config values by editing the config file using a text editor.
Technical
To install this mod, first install BepInEx for Subnautica, then place the dll file in BepInEx\plugins.