ᐅ Ventilation duct installed too low in the splash water zone

Hello,
I hope you can help me, as I have very limited knowledge in construction!
I moved into my newly built house last autumn and have been wondering from the start about the height of the ventilation shaft for the kitchen extractor fan, which was only slightly above ground level before the driveway was paved. When the driveway was paved in autumn, if the workers hadn’t been careful, the ventilation shaft would have been buried halfway below ground level.
Since the area around the base is exposed to the most stress, including moisture, I’m worried that water might enter my house through the shaft, especially during heavy rain. According to my installer, everything is fine. However, a colleague at work who is not a professional suggested that the shaft should be installed at least 30 cm (12 inches) above ground level.
Is the shaft installed too low, or should the installer have chosen a different height? What should I do in case of water damage?
I look forward to your answers!

Hope this gives you a better idea now 🙂

Is the kitchen located below the shaft, or does the duct run down from above? In general, I would be more concerned about blockages caused by leaves, dirt, and unwanted pests...

The kitchen is located above the shaft, which runs within the screed. From the cooktop, it then goes approximately 80 cm (31 inches) straight up.

In my opinion, this is poorly done (at least small animal protection should be ensured even at an exhaust outlet). The same applies to the long end of the orange PVC sewer pipe (KG pipe), which extends beyond ground level. Unfortunately, I cannot confirm this with official documents or legal references ... ;-). And who really knows the building codes and regulations abroad.

Who planned and built the house? Did you have an expert (certified inspector) by your side?

As a layperson, I would see the risk with rain or water accumulation. Won’t the water seep in there? [emoji33] But I’m just an amateur...