Not to go off on a tangent but for those wondering, I can perhaps provide some insight into how the shipping industry generally works (I'm a ship's officer when I'm not stuck at home!) - if you're interested more I'll happily discuss in a message or another thread as I don't want to take this away from its primary purpose;
Ships are charged fees for time spent docked "alongside" (can be up to thousands of dollars per day) - you may also be charged fees at some anchorages within port limits but generally, these are substantially less than the cost of actually docking. Depending on port these fees can either be per day, half-day or even per hour in busy terminals. You're also usually charged fees for occupying a berth but not loading/unloading at some of the busier ports. For that reason its generally unusual to find cargo ships docked alongside in busy ports any longer than needed - most busy ports it will be a case of, ship docks, within 30 minutes clearance paperwork is completed, offloading commences, loading commences (sometimes at the same time as unloading), loading completes, paperwork is done, the ship departs the berth.
For ro-ro carriers, once the ramps down the local rules usually have unionised labour (pretty much every country), depending on efficiency this usually involves several teams; 5-10 drivers will drive the cars on, followed by a minibus which will then pick the guys up and bring them back to the start point to jump in the next cars to be loaded... usually, there are multiple teams ensuring a constant flow of vehicles to minimise the time taken which ultimately minimises the cost. Cargo also generally has to be cleared for loading by customs and or other authorities so usually has to be in the port hours before loading - if not days.
There will be a loading plan to optimise space and efficiency, especially if the ship is stopping to load/unload at multiple ports en-route, as well as ensuring the weight is distributed evenly throughout the ship for stability reasons - if you don't do this, you end up with what happened in Southampton a few years ago ( Grounded ship 'unstable' from departure )
Another reason time alongside is usually minimised is that under the usual charter agreements that the owners have with the charterers delays which are caused by cargo not being ready to load, or as a result of charterer instructions result in heavy costs (in form of penalties as well as all operational costs during that time) being the responsibility of the charterer - this can easily reach thousands of dollars per day.
Anyhow, without knowing the exact details of Tesla's charter party agreement with Glovis (I assume they charter the ship and aren't just taking advantage of a liner service since they seem to only be Tesla's onboard) I can't say much more but hopefully, it's answered some thoughts you might have about why things are the way they are.
