just fyi there's a nice write-up of the situation (and "excitement") in Gizmodo's Chinese Rover to Investigate ‘Mysterious Hut’ Spotted on Far Side of Moon
I'm going to speculate that the faux-monolith is not going anywhere any time soon, so there's simply no rush whatsoever.
Since every meter of rover travel is inherently dangerous (so many things that can go wrong) it makes most sense to maximize the science obtained from of each bit of roving.
Being an apparently "funny shaped rock" in the distance does not suggest that it is likely to yield much science just because it happens to appear from far away to be funny shaped. Therefore it's probably considered by the mission planners to be very low priority.
All automated rovers on all bodies move on average far slower than their top speeds.
One reason is already alluded to above; they are movers of their scientific instruments, and those instruments can take quite a while to do their thing before they are ready for the rover to move to the next site. Modern rovers last for years, sometimes a decade or more. There is no rush.
If 200 m/h or 3.3 m/min is its top speed, that's going to be on flat, smooth, obstacle-free and relatively firm regolith. If any of those are not true between the rover and the funny looking rock (and most likely most of them are not true) then the actual speed can be limited by the obstacle avoidance and route-planning techniques they are using.
Per Wikipedia's Yutu-2 the rover has moved about 840 meters in about three years. Don't expect much change in that.
While the Curiosity and Perseverance rovers on Mars have developed over the years semi-autonomous obstacle detection and route planning, I think that Yutu-2 is not using this, but instead its movements around rocks, "sand-traps" and other potentially dangerous obstacles are carefully planned on Earth and instructions are sent regularly via links with the Queqiao relay satellite.
For some solar + battery powered rovers there are power limitations, but in this case with a relatively low mass rover in 1/6 of Earth gravity, I think it moves so slow that it can run directly off solar and doesn't need to worry about cycling its batteries.