"We want to do it, but we won't do it poorly. Don't expect it soon." (Paraphrased from multiple developer Q&As).
To understand why BeamNG.drive lacks native multiplayer, one must understand the computational load of its physics engine. can you play beamng drive online
Official multiplayer would likely utilize a deterministic physics engine or a specialized network prediction algorithm currently in research phases. However, as of the latest development roadmap, the priority remains refining the single-player physics and career mode, meaning official multiplayer remains a long-term goal rather than an imminent feature. "We want to do it, but we won't do it poorly